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Finding the Fourth Proportional to 68,658.16, 102,982.11 and 21,273.62

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Solution

The fourth proportional to 68,658.16, 102,982.11 and 21,273.62 is: 31,908.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,658.16 : 102,982.11 = 21,273.62 : x
  2. Step 2: Convert to fraction form
    68,658.16/102,982.11 = 21,273.62/x
  3. Step 3: Cross multiply
    68,658.16x = 102,982.11 × 21,273.62
  4. Step 4: Simplify right side
    68,658.16x = 2,190,801,843.60
  5. Step 5: Solve for x
    x = 2,190,801,843.60/68,658.16
  6. Step 6: Final answer
    x = 31,908.83

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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.