Home / 87,428.60-131,139.78-28,262.72

Finding the Fourth Proportional to 87,428.60, 131,139.78 and 28,262.72

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Solution

The fourth proportional to 87,428.60, 131,139.78 and 28,262.72 is: 42,393.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,428.60 : 131,139.78 = 28,262.72 : x
  2. Step 2: Convert to fraction form
    87,428.60/131,139.78 = 28,262.72/x
  3. Step 3: Cross multiply
    87,428.60x = 131,139.78 × 28,262.72
  4. Step 4: Simplify right side
    87,428.60x = 3,706,366,227.30
  5. Step 5: Solve for x
    x = 3,706,366,227.30/87,428.60
  6. Step 6: Final answer
    x = 42,393.07

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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.