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Finding the Fourth Proportional to 72,425.25, 108,617.12 and 21,829.18

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Solution

The fourth proportional to 72,425.25, 108,617.12 and 21,829.18 is: 32,737.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,425.25 : 108,617.12 = 21,829.18 : x
  2. Step 2: Convert to fraction form
    72,425.25/108,617.12 = 21,829.18/x
  3. Step 3: Cross multiply
    72,425.25x = 108,617.12 × 21,829.18
  4. Step 4: Simplify right side
    72,425.25x = 2,371,022,011.33
  5. Step 5: Solve for x
    x = 2,371,022,011.33/72,425.25
  6. Step 6: Final answer
    x = 32,737.51

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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.