Force on fulcrum for balanced seesaw with girl and boy

[R Sarwar]

Homework Statement

A girl and a boy are sitting in a see saw. The girl is 36 kg and sitting 5 m from the fulcrum. The boy is sitting 3 m from the fulcrum. Calculate the mass of the boy and the force on the fulcrum.

Homework Equations

Fr1=Fr2

The Attempt at a Solution

I solved for the boys mass by using the Fr1=Fr2 equation. I got 60 kg as the boys mass. I don't know how to solve for the force on the fulcrum.

 

[Stephen Tashi]

If the see-saw is perfectly balanced the fulcrum must push upward with a force equal to all the downward weight on the see-saw.