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Finding the Fourth Proportional to 87,145.92, 130,755.78 and 47,656.90

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Solution

The fourth proportional to 87,145.92, 130,755.78 and 47,656.90 is: 71,505.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,145.92 : 130,755.78 = 47,656.90 : x
  2. Step 2: Convert to fraction form
    87,145.92/130,755.78 = 47,656.90/x
  3. Step 3: Cross multiply
    87,145.92x = 130,755.78 × 47,656.90
  4. Step 4: Simplify right side
    87,145.92x = 6,231,414,804.99
  5. Step 5: Solve for x
    x = 6,231,414,804.99/87,145.92
  6. Step 6: Final answer
    x = 71,505.53

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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.