Finding the Fourth Proportional to 100,691.50, 138,919.64 and 62,437.26
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Solution
The fourth proportional to 100,691.50, 138,919.64 and 62,437.26 is: 86,141.95
Step by Step Solution
- Step 1: Write the proportion equation
100,691.50 : 138,919.64 = 62,437.26 : x - Step 2: Convert to fraction form
100,691.50/138,919.64 = 62,437.26/x - Step 3: Cross multiply
100,691.50x = 138,919.64 × 62,437.26 - Step 4: Simplify right side
100,691.50x = 8,673,761,681.79 - Step 5: Solve for x
x = 8,673,761,681.79/100,691.50 - Step 6: Final answer
x = 86,141.95
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.