I need help solving this!

Question

The work, W (in joules), done when lifting an object varies jointly with the product of the mass, m (in kilograms), of the object and the height, h (in meters), that the object is lifted. The work done when a 120-kilogram object is lifted 1.8 meters above the ground is 2116.8 joules. How much work is done when lifting a 100-kilogram object 1.5 meters above the ground?

Answer 1

W = kmh (constant * mass * ht)

2116.8 = k * 120 * 1.8

W = [2116.8/(120 * 1.8)] * 100 * 1.5

I will leave the arithmetic to you.