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Finding the Fourth Proportional to 121,884.52, 168,199.86 and 68,169.28

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Solution

The fourth proportional to 121,884.52, 168,199.86 and 68,169.28 is: 94,073.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,884.52 : 168,199.86 = 68,169.28 : x
  2. Step 2: Convert to fraction form
    121,884.52/168,199.86 = 68,169.28/x
  3. Step 3: Cross multiply
    121,884.52x = 168,199.86 × 68,169.28
  4. Step 4: Simplify right side
    121,884.52x = 11,466,063,352.30
  5. Step 5: Solve for x
    x = 11,466,063,352.30/121,884.52
  6. Step 6: Final answer
    x = 94,073.17

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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.