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Finding the Fourth Proportional to 87,821.60, 131,440.80 and 87,821.60

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Solution

The fourth proportional to 87,821.60, 131,440.80 and 87,821.60 is: 131,440.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,821.60 : 131,440.80 = 87,821.60 : x
  2. Step 2: Convert to fraction form
    87,821.60/131,440.80 = 87,821.60/x
  3. Step 3: Cross multiply
    87,821.60x = 131,440.80 × 87,821.60
  4. Step 4: Simplify right side
    87,821.60x = 11,543,341,361.28
  5. Step 5: Solve for x
    x = 11,543,341,361.28/87,821.60
  6. Step 6: Final answer
    x = 131,440.80

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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.