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Finding the Fourth Proportional to 87,629.60, 131,530.80 and 43,306.40

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Solution

The fourth proportional to 87,629.60, 131,530.80 and 43,306.40 is: 65,002.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,629.60 : 131,530.80 = 43,306.40 : x
  2. Step 2: Convert to fraction form
    87,629.60/131,530.80 = 43,306.40/x
  3. Step 3: Cross multiply
    87,629.60x = 131,530.80 × 43,306.40
  4. Step 4: Simplify right side
    87,629.60x = 5,696,125,437.12
  5. Step 5: Solve for x
    x = 5,696,125,437.12/87,629.60
  6. Step 6: Final answer
    x = 65,002.30

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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.