Finding the Fourth Proportional to 85,818.43, 128,560.05 and 40,775.68
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Solution
The fourth proportional to 85,818.43, 128,560.05 and 40,775.68 is: 61,083.89
Step by Step Solution
- Step 1: Write the proportion equation
85,818.43 : 128,560.05 = 40,775.68 : x - Step 2: Convert to fraction form
85,818.43/128,560.05 = 40,775.68/x - Step 3: Cross multiply
85,818.43x = 128,560.05 × 40,775.68 - Step 4: Simplify right side
85,818.43x = 5,242,123,773.19 - Step 5: Solve for x
x = 5,242,123,773.19/85,818.43 - Step 6: Final answer
x = 61,083.89
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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.