Home / 87,930.88-121,340.32-49,691.20

Finding the Fourth Proportional to 87,930.88, 121,340.32 and 49,691.20

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Solution

The fourth proportional to 87,930.88, 121,340.32 and 49,691.20 is: 68,571.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,930.88 : 121,340.32 = 49,691.20 : x
  2. Step 2: Convert to fraction form
    87,930.88/121,340.32 = 49,691.20/x
  3. Step 3: Cross multiply
    87,930.88x = 121,340.32 × 49,691.20
  4. Step 4: Simplify right side
    87,930.88x = 6,029,546,109.18
  5. Step 5: Solve for x
    x = 6,029,546,109.18/87,930.88
  6. Step 6: Final answer
    x = 68,571.43

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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.