Basically, the concept of inverse proportion means that as the absolute value or magnitude of one variable gets bigger, the absolute value or magnitude of another gets smaller, such that their product (the constant of proportionality) is always the same.
I have discovered in 20 years of moving around a ballpark, that the knowledge of the game is usually in inverse proportion to the price of the seats. Bill Veeck
People's intelligence tends to be in inverse proportion to their number. People don't tend to get smarter as they get into bigger groups. Robyn Hitchcock
The Law of Triviality... briefly stated, it means that the time spent on any item of the agenda will be in inverse proportion to the sum involved. C. Northcote Parkinson
The number of medals on an officer's breast varies in inverse proportion to the square of the distance of his duties from the front line. Charles Edward Montague
There thus appears to be an inverse correlation between recovery and psychotherapy; the more psychotherapy, the smaller the recovery rate. Hans Eysenck