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Finding the Fourth Proportional to 121,963.71, 168,304.39 and 67,517.90

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Solution

The fourth proportional to 121,963.71, 168,304.39 and 67,517.90 is: 93,171.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,963.71 : 168,304.39 = 67,517.90 : x
  2. Step 2: Convert to fraction form
    121,963.71/168,304.39 = 67,517.90/x
  3. Step 3: Cross multiply
    121,963.71x = 168,304.39 × 67,517.90
  4. Step 4: Simplify right side
    121,963.71x = 11,363,557,794.47
  5. Step 5: Solve for x
    x = 11,363,557,794.47/121,963.71
  6. Step 6: Final answer
    x = 93,171.63

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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.