Home / 87,120.60-130,839.30-76,234.20

Finding the Fourth Proportional to 87,120.60, 130,839.30 and 76,234.20

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Solution

The fourth proportional to 87,120.60, 130,839.30 and 76,234.20 is: 114,489.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,120.60 : 130,839.30 = 76,234.20 : x
  2. Step 2: Convert to fraction form
    87,120.60/130,839.30 = 76,234.20/x
  3. Step 3: Cross multiply
    87,120.60x = 130,839.30 × 76,234.20
  4. Step 4: Simplify right side
    87,120.60x = 9,974,429,364.06
  5. Step 5: Solve for x
    x = 9,974,429,364.06/87,120.60
  6. Step 6: Final answer
    x = 114,489.91

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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.