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Finding the Fourth Proportional to 68,040.46, 102,049.17 and 20,644.12

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Solution

The fourth proportional to 68,040.46, 102,049.17 and 20,644.12 is: 30,962.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,040.46 : 102,049.17 = 20,644.12 : x
  2. Step 2: Convert to fraction form
    68,040.46/102,049.17 = 20,644.12/x
  3. Step 3: Cross multiply
    68,040.46x = 102,049.17 × 20,644.12
  4. Step 4: Simplify right side
    68,040.46x = 2,106,714,697.91
  5. Step 5: Solve for x
    x = 2,106,714,697.91/68,040.46
  6. Step 6: Final answer
    x = 30,962.68

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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.