Home / 87,839.43-121,422.71-78,373.14

Finding the Fourth Proportional to 87,839.43, 121,422.71 and 78,373.14

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Solution

The fourth proportional to 87,839.43, 121,422.71 and 78,373.14 is: 108,337.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,839.43 : 121,422.71 = 78,373.14 : x
  2. Step 2: Convert to fraction form
    87,839.43/121,422.71 = 78,373.14/x
  3. Step 3: Cross multiply
    87,839.43x = 121,422.71 × 78,373.14
  4. Step 4: Simplify right side
    87,839.43x = 9,516,279,549.50
  5. Step 5: Solve for x
    x = 9,516,279,549.50/87,839.43
  6. Step 6: Final answer
    x = 108,337.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.