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Finding the Fourth Proportional to 87,887.62, 121,278.90 and 49,122.91

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Solution

The fourth proportional to 87,887.62, 121,278.90 and 49,122.91 is: 67,786.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,887.62 : 121,278.90 = 49,122.91 : x
  2. Step 2: Convert to fraction form
    87,887.62/121,278.90 = 49,122.91/x
  3. Step 3: Cross multiply
    87,887.62x = 121,278.90 × 49,122.91
  4. Step 4: Simplify right side
    87,887.62x = 5,957,572,489.60
  5. Step 5: Solve for x
    x = 5,957,572,489.60/87,887.62
  6. Step 6: Final answer
    x = 67,786.25

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1.5x scale

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.