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Finding the Fourth Proportional to 68,704.20, 103,061.10 and 27,145.80

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Solution

The fourth proportional to 68,704.20, 103,061.10 and 27,145.80 is: 40,720.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,704.20 : 103,061.10 = 27,145.80 : x
  2. Step 2: Convert to fraction form
    68,704.20/103,061.10 = 27,145.80/x
  3. Step 3: Cross multiply
    68,704.20x = 103,061.10 × 27,145.80
  4. Step 4: Simplify right side
    68,704.20x = 2,797,676,008.38
  5. Step 5: Solve for x
    x = 2,797,676,008.38/68,704.20
  6. Step 6: Final answer
    x = 40,720.60

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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.