Finding the Fourth Proportional to 84.13, 126.16 and 74.07
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Solution
The fourth proportional to 84.13, 126.16 and 74.07 is: 111.08
Step by Step Solution
- Step 1: Write the proportion equation
84.13 : 126.16 = 74.07 : x - Step 2: Convert to fraction form
84.13/126.16 = 74.07/x - Step 3: Cross multiply
84.13x = 126.16 × 74.07 - Step 4: Simplify right side
84.13x = 9,344.49 - Step 5: Solve for x
x = 9,344.49/84.13 - Step 6: Final answer
x = 111.08
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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.