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Finding the Fourth Proportional to 87,331.78, 120,517.80 and 47,587.78

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Solution

The fourth proportional to 87,331.78, 120,517.80 and 47,587.78 is: 65,671.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,331.78 : 120,517.80 = 47,587.78 : x
  2. Step 2: Convert to fraction form
    87,331.78/120,517.80 = 47,587.78/x
  3. Step 3: Cross multiply
    87,331.78x = 120,517.80 × 47,587.78
  4. Step 4: Simplify right side
    87,331.78x = 5,735,174,552.48
  5. Step 5: Solve for x
    x = 5,735,174,552.48/87,331.78
  6. Step 6: Final answer
    x = 65,671.11

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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.