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Finding the Fourth Proportional to 87,620.80, 131,431.20 and 59,627.20

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Solution

The fourth proportional to 87,620.80, 131,431.20 and 59,627.20 is: 89,440.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,620.80 : 131,431.20 = 59,627.20 : x
  2. Step 2: Convert to fraction form
    87,620.80/131,431.20 = 59,627.20/x
  3. Step 3: Cross multiply
    87,620.80x = 131,431.20 × 59,627.20
  4. Step 4: Simplify right side
    87,620.80x = 7,836,874,448.64
  5. Step 5: Solve for x
    x = 7,836,874,448.64/87,620.80
  6. Step 6: Final answer
    x = 89,440.80

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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.