Finding the Fourth Proportional to 91,397.36, 137,082.17 and 31,434.95
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Solution
The fourth proportional to 91,397.36, 137,082.17 and 31,434.95 is: 47,147.66
Step by Step Solution
- Step 1: Write the proportion equation
91,397.36 : 137,082.17 = 31,434.95 : x - Step 2: Convert to fraction form
91,397.36/137,082.17 = 31,434.95/x - Step 3: Cross multiply
91,397.36x = 137,082.17 × 31,434.95 - Step 4: Simplify right side
91,397.36x = 4,309,171,581.13 - Step 5: Solve for x
x = 4,309,171,581.13/91,397.36 - Step 6: Final answer
x = 47,147.66
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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.