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Finding the Fourth Proportional to 72,481.68, 108,738.88 and 25,734.56

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Solution

The fourth proportional to 72,481.68, 108,738.88 and 25,734.56 is: 38,607.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,481.68 : 108,738.88 = 25,734.56 : x
  2. Step 2: Convert to fraction form
    72,481.68/108,738.88 = 25,734.56/x
  3. Step 3: Cross multiply
    72,481.68x = 108,738.88 × 25,734.56
  4. Step 4: Simplify right side
    72,481.68x = 2,798,347,231.69
  5. Step 5: Solve for x
    x = 2,798,347,231.69/72,481.68
  6. Step 6: Final answer
    x = 38,607.65

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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.