Home / 87,864.60-131,796.90-81,989.40

Finding the Fourth Proportional to 87,864.60, 131,796.90 and 81,989.40

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Solution

The fourth proportional to 87,864.60, 131,796.90 and 81,989.40 is: 122,984.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,864.60 : 131,796.90 = 81,989.40 : x
  2. Step 2: Convert to fraction form
    87,864.60/131,796.90 = 81,989.40/x
  3. Step 3: Cross multiply
    87,864.60x = 131,796.90 × 81,989.40
  4. Step 4: Simplify right side
    87,864.60x = 10,805,948,752.86
  5. Step 5: Solve for x
    x = 10,805,948,752.86/87,864.60
  6. Step 6: Final answer
    x = 122,984.10

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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.