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Finding the Fourth Proportional to 87,469.16, 120,718.50 and 49,230.68

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Solution

The fourth proportional to 87,469.16, 120,718.50 and 49,230.68 is: 67,944.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,469.16 : 120,718.50 = 49,230.68 : x
  2. Step 2: Convert to fraction form
    87,469.16/120,718.50 = 49,230.68/x
  3. Step 3: Cross multiply
    87,469.16x = 120,718.50 × 49,230.68
  4. Step 4: Simplify right side
    87,469.16x = 5,943,053,843.58
  5. Step 5: Solve for x
    x = 5,943,053,843.58/87,469.16
  6. Step 6: Final answer
    x = 67,944.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.