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Finding the Fourth Proportional to 90,129.92, 124,375.91 and 49,840.52

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Solution

The fourth proportional to 90,129.92, 124,375.91 and 49,840.52 is: 68,778.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,129.92 : 124,375.91 = 49,840.52 : x
  2. Step 2: Convert to fraction form
    90,129.92/124,375.91 = 49,840.52/x
  3. Step 3: Cross multiply
    90,129.92x = 124,375.91 × 49,840.52
  4. Step 4: Simplify right side
    90,129.92x = 6,198,959,158.79
  5. Step 5: Solve for x
    x = 6,198,959,158.79/90,129.92
  6. Step 6: Final answer
    x = 68,778.04

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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.