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Finding the Fourth Proportional to 120,337.92, 165,862.08 and 91,981.44

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Solution

The fourth proportional to 120,337.92, 165,862.08 and 91,981.44 is: 126,778.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,337.92 : 165,862.08 = 91,981.44 : x
  2. Step 2: Convert to fraction form
    120,337.92/165,862.08 = 91,981.44/x
  3. Step 3: Cross multiply
    120,337.92x = 165,862.08 × 91,981.44
  4. Step 4: Simplify right side
    120,337.92x = 15,256,232,959.80
  5. Step 5: Solve for x
    x = 15,256,232,959.80/120,337.92
  6. Step 6: Final answer
    x = 126,778.27

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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.