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Finding the Fourth Proportional to 87,340.60, 131,010.90 and 85,882.60

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Solution

The fourth proportional to 87,340.60, 131,010.90 and 85,882.60 is: 128,823.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,340.60 : 131,010.90 = 85,882.60 : x
  2. Step 2: Convert to fraction form
    87,340.60/131,010.90 = 85,882.60/x
  3. Step 3: Cross multiply
    87,340.60x = 131,010.90 × 85,882.60
  4. Step 4: Simplify right side
    87,340.60x = 11,251,556,720.34
  5. Step 5: Solve for x
    x = 11,251,556,720.34/87,340.60
  6. Step 6: Final answer
    x = 128,823.90

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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.