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Finding the Fourth Proportional to 68,839.80, 103,218.15 and 30,882.15

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Solution

The fourth proportional to 68,839.80, 103,218.15 and 30,882.15 is: 46,304.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,839.80 : 103,218.15 = 30,882.15 : x
  2. Step 2: Convert to fraction form
    68,839.80/103,218.15 = 30,882.15/x
  3. Step 3: Cross multiply
    68,839.80x = 103,218.15 × 30,882.15
  4. Step 4: Simplify right side
    68,839.80x = 3,187,598,391.02
  5. Step 5: Solve for x
    x = 3,187,598,391.02/68,839.80
  6. Step 6: Final answer
    x = 46,304.59

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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.