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Finding the Fourth Proportional to 87,391.82, 120,610.95 and 49,671.74

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Solution

The fourth proportional to 87,391.82, 120,610.95 and 49,671.74 is: 68,552.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,391.82 : 120,610.95 = 49,671.74 : x
  2. Step 2: Convert to fraction form
    87,391.82/120,610.95 = 49,671.74/x
  3. Step 3: Cross multiply
    87,391.82x = 120,610.95 × 49,671.74
  4. Step 4: Simplify right side
    87,391.82x = 5,990,955,749.55
  5. Step 5: Solve for x
    x = 5,990,955,749.55/87,391.82
  6. Step 6: Final answer
    x = 68,552.82

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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.