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Finding the Fourth Proportional to 87,881.92, 121,278.72 and 48,137.92

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Solution

The fourth proportional to 87,881.92, 121,278.72 and 48,137.92 is: 66,431.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,881.92 : 121,278.72 = 48,137.92 : x
  2. Step 2: Convert to fraction form
    87,881.92/121,278.72 = 48,137.92/x
  3. Step 3: Cross multiply
    87,881.92x = 121,278.72 × 48,137.92
  4. Step 4: Simplify right side
    87,881.92x = 5,838,105,321.06
  5. Step 5: Solve for x
    x = 5,838,105,321.06/87,881.92
  6. Step 6: Final answer
    x = 66,431.24

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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.