Home / 87,415.70-131,123.55-85,666.10

Finding the Fourth Proportional to 87,415.70, 131,123.55 and 85,666.10

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Solution

The fourth proportional to 87,415.70, 131,123.55 and 85,666.10 is: 128,499.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,415.70 : 131,123.55 = 85,666.10 : x
  2. Step 2: Convert to fraction form
    87,415.70/131,123.55 = 85,666.10/x
  3. Step 3: Cross multiply
    87,415.70x = 131,123.55 × 85,666.10
  4. Step 4: Simplify right side
    87,415.70x = 11,232,843,146.66
  5. Step 5: Solve for x
    x = 11,232,843,146.66/87,415.70
  6. Step 6: Final answer
    x = 128,499.15

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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.