So whats the question your getting at? If you have a 100" screen seating distance should be approximately 11 feet, if that helps.
Unless I'm reading it wrong, those numbers don't add up. Your room is a little over 15 feet from front to back; there is a pole about 15 inches from the back wall; you put your couch in front of the pole, so you should have roughly 13-14 feet in front of you, but your TV is only 10 feet away? Is the TV 3-4 feet deep or do you have it pulled 3-4 feet away from the front wall?My theater room is 20 feet size to side and a little over 15 feet front to back. I have a pole in the room that's in the middle,so,I put my couch in front of the pole so that leaves about 10 feet from the couch to the tv and I have a 73 inch DLP. The pole is about 15 inches of the back wall
Just to clarify, this rule is applied for 16x9 AR screen and it is 1.5 x width of the screen, not the diagonal dimension, which is usually what screens are measured by. This is a minimum recommended seating distance (from the eyes to the screen) according to THX standards.Rule of thumb is 1.5" for every 1" of screen size.