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Finding the Fourth Proportional to 121,691.62, 167,933.72 and 67,976.47

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Solution

The fourth proportional to 121,691.62, 167,933.72 and 67,976.47 is: 93,807.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,691.62 : 167,933.72 = 67,976.47 : x
  2. Step 2: Convert to fraction form
    121,691.62/167,933.72 = 67,976.47/x
  3. Step 3: Cross multiply
    121,691.62x = 167,933.72 × 67,976.47
  4. Step 4: Simplify right side
    121,691.62x = 11,415,541,479.57
  5. Step 5: Solve for x
    x = 11,415,541,479.57/121,691.62
  6. Step 6: Final answer
    x = 93,807.13

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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.