*I'm assuming ib is a typo for lb.
You can set up a proportion saying:
[tex] \frac{10}{4} = \frac{95}{x} [/tex]
Cross multiply:
[tex]10x = 4(95)[/tex]
[tex]x = \frac{4(95)}{10} = 38 [/tex]
So, you would weigh 38 lbs on Mars if you weighed 95 lbs on Earth.
