Finding the Fourth Proportional to 81.14, 122.33 and 75.92
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Solution
The fourth proportional to 81.14, 122.33 and 75.92 is: 114.46
Step by Step Solution
- Step 1: Write the proportion equation
81.14 : 122.33 = 75.92 : x - Step 2: Convert to fraction form
81.14/122.33 = 75.92/x - Step 3: Cross multiply
81.14x = 122.33 × 75.92 - Step 4: Simplify right side
81.14x = 9,287.29 - Step 5: Solve for x
x = 9,287.29/81.14 - Step 6: Final answer
x = 114.46
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.