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Finding the Fourth Proportional to 87,807.60, 131,754.60 and 66,740.40

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Solution

The fourth proportional to 87,807.60, 131,754.60 and 66,740.40 is: 100,143.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,807.60 : 131,754.60 = 66,740.40 : x
  2. Step 2: Convert to fraction form
    87,807.60/131,754.60 = 66,740.40/x
  3. Step 3: Cross multiply
    87,807.60x = 131,754.60 × 66,740.40
  4. Step 4: Simplify right side
    87,807.60x = 8,793,354,705.84
  5. Step 5: Solve for x
    x = 8,793,354,705.84/87,807.60
  6. Step 6: Final answer
    x = 100,143.44

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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.