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Finding the Fourth Proportional to 73,249.89, 109,877.54 and 20,660.78

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Solution

The fourth proportional to 73,249.89, 109,877.54 and 20,660.78 is: 30,991.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,249.89 : 109,877.54 = 20,660.78 : x
  2. Step 2: Convert to fraction form
    73,249.89/109,877.54 = 20,660.78/x
  3. Step 3: Cross multiply
    73,249.89x = 109,877.54 × 20,660.78
  4. Step 4: Simplify right side
    73,249.89x = 2,270,155,028.19
  5. Step 5: Solve for x
    x = 2,270,155,028.19/73,249.89
  6. Step 6: Final answer
    x = 30,991.92

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1.5x scale

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.