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Finding the Fourth Proportional to 72,155.28, 108,205.28 and 34,691.68

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Solution

The fourth proportional to 72,155.28, 108,205.28 and 34,691.68 is: 52,024.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,155.28 : 108,205.28 = 34,691.68 : x
  2. Step 2: Convert to fraction form
    72,155.28/108,205.28 = 34,691.68/x
  3. Step 3: Cross multiply
    72,155.28x = 108,205.28 × 34,691.68
  4. Step 4: Simplify right side
    72,155.28x = 3,753,822,948.07
  5. Step 5: Solve for x
    x = 3,753,822,948.07/72,155.28
  6. Step 6: Final answer
    x = 52,024.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.