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Finding the Fourth Proportional to 279,082.62, 418,620.33 and 68,722.38

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Solution

The fourth proportional to 279,082.62, 418,620.33 and 68,722.38 is: 103,082.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,082.62 : 418,620.33 = 68,722.38 : x
  2. Step 2: Convert to fraction form
    279,082.62/418,620.33 = 68,722.38/x
  3. Step 3: Cross multiply
    279,082.62x = 418,620.33 × 68,722.38
  4. Step 4: Simplify right side
    279,082.62x = 28,768,585,393.99
  5. Step 5: Solve for x
    x = 28,768,585,393.99/279,082.62
  6. Step 6: Final answer
    x = 103,082.68

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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.