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Finding the Fourth Proportional to 82,301.80, 123,452.70 and 72,452.20

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Solution

The fourth proportional to 82,301.80, 123,452.70 and 72,452.20 is: 108,678.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,301.80 : 123,452.70 = 72,452.20 : x
  2. Step 2: Convert to fraction form
    82,301.80/123,452.70 = 72,452.20/x
  3. Step 3: Cross multiply
    82,301.80x = 123,452.70 × 72,452.20
  4. Step 4: Simplify right side
    82,301.80x = 8,944,419,710.94
  5. Step 5: Solve for x
    x = 8,944,419,710.94/82,301.80
  6. Step 6: Final answer
    x = 108,678.30

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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.