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Finding the Fourth Proportional to 71,882.81, 99,198.93 and 39,618.57

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Solution

The fourth proportional to 71,882.81, 99,198.93 and 39,618.57 is: 54,673.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,882.81 : 99,198.93 = 39,618.57 : x
  2. Step 2: Convert to fraction form
    71,882.81/99,198.93 = 39,618.57/x
  3. Step 3: Cross multiply
    71,882.81x = 99,198.93 × 39,618.57
  4. Step 4: Simplify right side
    71,882.81x = 3,930,119,752.13
  5. Step 5: Solve for x
    x = 3,930,119,752.13/71,882.81
  6. Step 6: Final answer
    x = 54,673.99

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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.