Finding the Fourth Proportional to 72.24, 108.35 and 42
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Solution
The fourth proportional to 72.24, 108.35 and 42 is: 62.99
Step by Step Solution
- Step 1: Write the proportion equation
72.24 : 108.35 = 42 : x - Step 2: Convert to fraction form
72.24/108.35 = 42/x - Step 3: Cross multiply
72.24x = 108.35 × 42 - Step 4: Simplify right side
72.24x = 4,550.70 - Step 5: Solve for x
x = 4,550.70/72.24 - Step 6: Final answer
x = 62.99
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.