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Finding the Fourth Proportional to 73,169.11, 109,753.68 and 20,578.60

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Solution

The fourth proportional to 73,169.11, 109,753.68 and 20,578.60 is: 30,867.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,169.11 : 109,753.68 = 20,578.60 : x
  2. Step 2: Convert to fraction form
    73,169.11/109,753.68 = 20,578.60/x
  3. Step 3: Cross multiply
    73,169.11x = 109,753.68 × 20,578.60
  4. Step 4: Simplify right side
    73,169.11x = 2,258,576,984.93
  5. Step 5: Solve for x
    x = 2,258,576,984.93/73,169.11
  6. Step 6: Final answer
    x = 30,867.90

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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.