Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10: 0134467795
ISBN 13: 978-0-13446-779-5

Chapter 5 - Ratio and Proportion - 5.5 Solving Application Problems with Proportions - 5.5 Exercises - Page 365: 28


A child weighing 80 pounds has 72 pounds of water.

Work Step by Step

$\frac{90\ lb\ water}{100\ lb\ body} = \frac{x\ lb\ water}{80\ lb\ body}$ $100x = 90\times80$ $\frac{100x}{100} = \frac{7200}{100}$ $x = 72$
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