Finding the Fourth Proportional to 138,963.87, 191,744.87 and 77,711.19
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Solution
The fourth proportional to 138,963.87, 191,744.87 and 77,711.19 is: 107,227.31
Step by Step Solution
- Step 1: Write the proportion equation
138,963.87 : 191,744.87 = 77,711.19 : x - Step 2: Convert to fraction form
138,963.87/191,744.87 = 77,711.19/x - Step 3: Cross multiply
138,963.87x = 191,744.87 × 77,711.19 - Step 4: Simplify right side
138,963.87x = 14,900,721,635.54 - Step 5: Solve for x
x = 14,900,721,635.54/138,963.87 - Step 6: Final answer
x = 107,227.31
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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.