The King of Pentacles speaks of authority, tradition, and success in money matters. When he appears in a reading, it's a sign that now is not a time to be a maverick, now is a time to follow the establish way of doing things. When he stands in for a literal man in your life, it generally refers to a very masculine fellow with hair and eyes on the darker end of the spectrum.
In general the King of Pentacles urges us to be good stewards: of our lives, of our energies, and the concrete resources that are available to us. If he's referring to a man in your life, know that this is a man who you can believe in and trust absolutely.
Career & Employment
An older, established man plays a major role in your working environment (even if on the surface, it seems that you work with all women.) This man is wise, fair, but somewhat quick to pass judgment. This man may become a staunch supporter of yours even if you've not met him thus far. Be prepared for scrutiny at all times – you'll be glad that you were.
Love & Relationships
This King is an excellent omen with regard to love. Someone may come along and absolutely sweep you right off of your feet. Yes, try to put your best foot forward, but don't pretend to be someone that you are not. This person will love you for exactly who you are. Be honest and everything should fall into place. If you're currently involved with someone, the relationship may very well move into a more comfortable place, (metaphorically speaking) but if you are dissatisfied, you'll need to say so for things to change. Don't expect your beloved to read your mind.
Finances & Income
The King of Pentacles is an excellent card to receive with regard to financial questions. Your finances are very likely to be on the upswing, largely due to your own efforts and/or wise investments. This is not a time to speculate wildly. Take calculated risks, perhaps, but don't get carried away. Share your wealth when and where you feel moved to do so. Remember that money is just money; you can't take it with you.
Mental & Physical Health
Your health status can be improved if you make a point to face and to vent negative feelings; however you of course must be thoughtful about how, where, and when you do so. Tradition and ritual can be comforting to you now. What comforts the soul, would also comfort your body. What healthy rituals do you have? If the answer is none, experiment until you find one that you enjoy. Your health will benefit.
You may not know what you need to feel more spiritually fulfilled, perhaps because your focus, perhaps for many years, has mainly been on your financial security. Give it some thought. If you simply have no background whatsoever in spiritual traditions, the internet or your local library will offer many thought provoking resources. Take the time to feed your spirit. Believe it or not, your financial life will benefit as a result.