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Finding the Fourth Proportional to 73,229.80, 109,844.70 and 72,711.40

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Solution

The fourth proportional to 73,229.80, 109,844.70 and 72,711.40 is: 109,067.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,229.80 : 109,844.70 = 72,711.40 : x
  2. Step 2: Convert to fraction form
    73,229.80/109,844.70 = 72,711.40/x
  3. Step 3: Cross multiply
    73,229.80x = 109,844.70 × 72,711.40
  4. Step 4: Simplify right side
    73,229.80x = 7,986,961,919.58
  5. Step 5: Solve for x
    x = 7,986,961,919.58/73,229.80
  6. Step 6: Final answer
    x = 109,067.10

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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.