Finding the Fourth Proportional to 81,693,165.60, 122,539,748.40 and 75,457,591.20
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Solution
The fourth proportional to 81,693,165.60, 122,539,748.40 and 75,457,591.20 is: 113,186,386.80
Step by Step Solution
- Step 1: Write the proportion equation
81,693,165.60 : 122,539,748.40 = 75,457,591.20 : x - Step 2: Convert to fraction form
81,693,165.60/122,539,748.40 = 75,457,591.20/x - Step 3: Cross multiply
81,693,165.60x = 122,539,748.40 × 75,457,591.20 - Step 4: Simplify right side
81,693,165.60x = 9,246,554,240,518,054 - Step 5: Solve for x
x = 9,246,554,240,518,054/81,693,165.60 - Step 6: Final answer
x = 113,186,386.80
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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.