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Finding the Fourth Proportional to 72,148.59, 108,221.67 and 25,400.25

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Solution

The fourth proportional to 72,148.59, 108,221.67 and 25,400.25 is: 38,099.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,148.59 : 108,221.67 = 25,400.25 : x
  2. Step 2: Convert to fraction form
    72,148.59/108,221.67 = 25,400.25/x
  3. Step 3: Cross multiply
    72,148.59x = 108,221.67 × 25,400.25
  4. Step 4: Simplify right side
    72,148.59x = 2,748,857,473.42
  5. Step 5: Solve for x
    x = 2,748,857,473.42/72,148.59
  6. Step 6: Final answer
    x = 38,099.95

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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.