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Finding the Fourth Proportional to 72,867.72, 109,327.68 and 25,489.68

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Solution

The fourth proportional to 72,867.72, 109,327.68 and 25,489.68 is: 38,243.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,867.72 : 109,327.68 = 25,489.68 : x
  2. Step 2: Convert to fraction form
    72,867.72/109,327.68 = 25,489.68/x
  3. Step 3: Cross multiply
    72,867.72x = 109,327.68 × 25,489.68
  4. Step 4: Simplify right side
    72,867.72x = 2,786,727,578.34
  5. Step 5: Solve for x
    x = 2,786,727,578.34/72,867.72
  6. Step 6: Final answer
    x = 38,243.65

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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.