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Finding the Fourth Proportional to 87,693.77, 131,560.13 and 40,921.13

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Solution

The fourth proportional to 87,693.77, 131,560.13 and 40,921.13 is: 61,390.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,693.77 : 131,560.13 = 40,921.13 : x
  2. Step 2: Convert to fraction form
    87,693.77/131,560.13 = 40,921.13/x
  3. Step 3: Cross multiply
    87,693.77x = 131,560.13 × 40,921.13
  4. Step 4: Simplify right side
    87,693.77x = 5,383,588,649.04
  5. Step 5: Solve for x
    x = 5,383,588,649.04/87,693.77
  6. Step 6: Final answer
    x = 61,390.78

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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.