On an airplane with tricycle gears, the main gear supports most of the weight and is therefore the strongest. The nose gear prevents the nose tipping down, since the center of gravity is forward of the main gear.
What is the typical ratio of weight distribution between the nose gear and all main gears?
For the purpose of the question, I'm mostly interested in airliners, although an answer comparing that with GA would be useful as well. I understand that the weight distribution varies with loading, so perhaps a range would do (e.g. on most airliners the max nose gear loading cannot exceed X:Y).