Finding the Fourth Proportional to 77,894,386.18, 106,931,356.52 and 66,861,982.70
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Solution
The fourth proportional to 77,894,386.18, 106,931,356.52 and 66,861,982.70 is: 91,786,364.34
Step by Step Solution
- Step 1: Write the proportion equation
77,894,386.18 : 106,931,356.52 = 66,861,982.70 : x - Step 2: Convert to fraction form
77,894,386.18/106,931,356.52 = 66,861,982.70/x - Step 3: Cross multiply
77,894,386.18x = 106,931,356.52 × 66,861,982.70 - Step 4: Simplify right side
77,894,386.18x = 7,149,642,509,727,772 - Step 5: Solve for x
x = 7,149,642,509,727,772/77,894,386.18 - Step 6: Final answer
x = 91,786,364.34
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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.