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Finding the Fourth Proportional to 68,851.20, 103,246.08 and 19,591.68

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Solution

The fourth proportional to 68,851.20, 103,246.08 and 19,591.68 is: 29,378.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,851.20 : 103,246.08 = 19,591.68 : x
  2. Step 2: Convert to fraction form
    68,851.20/103,246.08 = 19,591.68/x
  3. Step 3: Cross multiply
    68,851.20x = 103,246.08 × 19,591.68
  4. Step 4: Simplify right side
    68,851.20x = 2,022,764,160.61
  5. Step 5: Solve for x
    x = 2,022,764,160.61/68,851.20
  6. Step 6: Final answer
    x = 29,378.78

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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.