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Finding the Fourth Proportional to 71,882.25, 99,198.19 and 39,618.03

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Solution

The fourth proportional to 71,882.25, 99,198.19 and 39,618.03 is: 54,673.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,882.25 : 99,198.19 = 39,618.03 : x
  2. Step 2: Convert to fraction form
    71,882.25/99,198.19 = 39,618.03/x
  3. Step 3: Cross multiply
    71,882.25x = 99,198.19 × 39,618.03
  4. Step 4: Simplify right side
    71,882.25x = 3,930,036,669.28
  5. Step 5: Solve for x
    x = 3,930,036,669.28/71,882.25
  6. Step 6: Final answer
    x = 54,673.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.