Finding the Fourth Proportional to 84.13, 126.42 and 47.62
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Solution
The fourth proportional to 84.13, 126.42 and 47.62 is: 71.56
Step by Step Solution
- Step 1: Write the proportion equation
84.13 : 126.42 = 47.62 : x - Step 2: Convert to fraction form
84.13/126.42 = 47.62/x - Step 3: Cross multiply
84.13x = 126.42 × 47.62 - Step 4: Simplify right side
84.13x = 6,019.87 - Step 5: Solve for x
x = 6,019.87/84.13 - Step 6: Final answer
x = 71.56
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.