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Finding the Fourth Proportional to 68,729.20, 103,126.20 and 51,233.20

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Solution

The fourth proportional to 68,729.20, 103,126.20 and 51,233.20 is: 76,873.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,729.20 : 103,126.20 = 51,233.20 : x
  2. Step 2: Convert to fraction form
    68,729.20/103,126.20 = 51,233.20/x
  3. Step 3: Cross multiply
    68,729.20x = 103,126.20 × 51,233.20
  4. Step 4: Simplify right side
    68,729.20x = 5,283,485,229.84
  5. Step 5: Solve for x
    x = 5,283,485,229.84/68,729.20
  6. Step 6: Final answer
    x = 76,873.95

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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.