Out of curiosity Tom, whats the problem you're trying to solve by finding this out?
Can only think of trying to find a good location for a warehouse from three suppliers?
#detective
OK. I'm in training for a mega bike ride. Two others, who live 5 miles and 20 miles away from me are also in training for said ride.
It would be nice if we could find a point that is the same distance away for all of us so that we could ride there when we meet up to start out training rides.
That way, we would have all covered the same distance.
The trouble is, we are all more or less in a line, with one of them 5 miles away from me in one direction, and one 20 miles away in the other.