Finding the Fourth Proportional to 85,412,134.60, 128,118,201.90 and 84,615,872.20
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Solution
The fourth proportional to 85,412,134.60, 128,118,201.90 and 84,615,872.20 is: 126,923,808.30
Step by Step Solution
- Step 1: Write the proportion equation
85,412,134.60 : 128,118,201.90 = 84,615,872.20 : x - Step 2: Convert to fraction form
85,412,134.60/128,118,201.90 = 84,615,872.20/x - Step 3: Cross multiply
85,412,134.60x = 128,118,201.90 × 84,615,872.20 - Step 4: Simplify right side
85,412,134.60x = 10,840,833,398,464,198 - Step 5: Solve for x
x = 10,840,833,398,464,198/85,412,134.60 - Step 6: Final answer
x = 126,923,808.30
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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.