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Finding the Fourth Proportional to 68,481.62, 102,739.02 and 21,734.90

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Solution

The fourth proportional to 68,481.62, 102,739.02 and 21,734.90 is: 32,607.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,481.62 : 102,739.02 = 21,734.90 : x
  2. Step 2: Convert to fraction form
    68,481.62/102,739.02 = 21,734.90/x
  3. Step 3: Cross multiply
    68,481.62x = 102,739.02 × 21,734.90
  4. Step 4: Simplify right side
    68,481.62x = 2,233,022,325.80
  5. Step 5: Solve for x
    x = 2,233,022,325.80/68,481.62
  6. Step 6: Final answer
    x = 32,607.62

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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.