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Finding the Fourth Proportional to 84,391.97, 126,650.25 and 40,018.86

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Solution

The fourth proportional to 84,391.97, 126,650.25 and 40,018.86 is: 60,057.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,391.97 : 126,650.25 = 40,018.86 : x
  2. Step 2: Convert to fraction form
    84,391.97/126,650.25 = 40,018.86/x
  3. Step 3: Cross multiply
    84,391.97x = 126,650.25 × 40,018.86
  4. Step 4: Simplify right side
    84,391.97x = 5,068,398,623.72
  5. Step 5: Solve for x
    x = 5,068,398,623.72/84,391.97
  6. Step 6: Final answer
    x = 60,057.83

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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.