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Finding the Fourth Proportional to 68,351.14, 102,529.80 and 20,962.80

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Solution

The fourth proportional to 68,351.14, 102,529.80 and 20,962.80 is: 31,445.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,351.14 : 102,529.80 = 20,962.80 : x
  2. Step 2: Convert to fraction form
    68,351.14/102,529.80 = 20,962.80/x
  3. Step 3: Cross multiply
    68,351.14x = 102,529.80 × 20,962.80
  4. Step 4: Simplify right side
    68,351.14x = 2,149,311,691.44
  5. Step 5: Solve for x
    x = 2,149,311,691.44/68,351.14
  6. Step 6: Final answer
    x = 31,445.15

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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.