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Finding the Fourth Proportional to 121,863.52, 168,164.68 and 67,412.44

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Solution

The fourth proportional to 121,863.52, 168,164.68 and 67,412.44 is: 93,025.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,863.52 : 168,164.68 = 67,412.44 : x
  2. Step 2: Convert to fraction form
    121,863.52/168,164.68 = 67,412.44/x
  3. Step 3: Cross multiply
    121,863.52x = 168,164.68 × 67,412.44
  4. Step 4: Simplify right side
    121,863.52x = 11,336,391,400.62
  5. Step 5: Solve for x
    x = 11,336,391,400.62/121,863.52
  6. Step 6: Final answer
    x = 93,025.31

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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.