Finding the Fourth Proportional to 77,214,931.20, 115,864,387.20 and 31,781,318.40
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Solution
The fourth proportional to 77,214,931.20, 115,864,387.20 and 31,781,318.40 is: 47,689,260.66
Step by Step Solution
- Step 1: Write the proportion equation
77,214,931.20 : 115,864,387.20 = 31,781,318.40 : x - Step 2: Convert to fraction form
77,214,931.20/115,864,387.20 = 31,781,318.40/x - Step 3: Cross multiply
77,214,931.20x = 115,864,387.20 × 31,781,318.40 - Step 4: Simplify right side
77,214,931.20x = 3,682,322,980,824,084.50 - Step 5: Solve for x
x = 3,682,322,980,824,084.50/77,214,931.20 - Step 6: Final answer
x = 47,689,260.66
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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.