Finding the Fourth Proportional to 81,660,207.20, 122,490,310.80 and 72,731,998.40
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Solution
The fourth proportional to 81,660,207.20, 122,490,310.80 and 72,731,998.40 is: 109,097,997.60
Step by Step Solution
- Step 1: Write the proportion equation
81,660,207.20 : 122,490,310.80 = 72,731,998.40 : x - Step 2: Convert to fraction form
81,660,207.20/122,490,310.80 = 72,731,998.40/x - Step 3: Cross multiply
81,660,207.20x = 122,490,310.80 × 72,731,998.40 - Step 4: Simplify right side
81,660,207.20x = 8,908,965,089,121,103 - Step 5: Solve for x
x = 8,908,965,089,121,103/81,660,207.20 - Step 6: Final answer
x = 109,097,997.60
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Similar ratio
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1.5x scale
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.