Finding the Fourth Proportional to 77,894,381.43, 106,931,349.99 and 66,861,977.92
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Solution
The fourth proportional to 77,894,381.43, 106,931,349.99 and 66,861,977.92 is: 91,786,357.76
Step by Step Solution
- Step 1: Write the proportion equation
77,894,381.43 : 106,931,349.99 = 66,861,977.92 : x - Step 2: Convert to fraction form
77,894,381.43/106,931,349.99 = 66,861,977.92/x - Step 3: Cross multiply
77,894,381.43x = 106,931,349.99 × 66,861,977.92 - Step 4: Simplify right side
77,894,381.43x = 7,149,641,561,719,843 - Step 5: Solve for x
x = 7,149,641,561,719,843/77,894,381.43 - Step 6: Final answer
x = 91,786,357.76
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.