Question 10: Divide the number 120 into 3 parts proportional to 1.5; 2; 2.5. Each section in turn is:

Let a, b, c be the numbers that are proportional to the numbers 1.5; 2; 2.5.

We have:

\(\frac{a}{{1,5}} = \frac{b}{2} = \frac{c}{{2,5}} \Rightarrow \frac{a}{{1,5}} = \frac{b}{2} = \frac{c}{{2,5}} = \frac{{a + b + c}}{6} = \frac{{120}}{6} = 20 \)

From there, calculate a = 30; b = 40; c = 50