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Finding the Fourth Proportional to 68,661, 102,992.12 and 27,108

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Solution

The fourth proportional to 68,661, 102,992.12 and 27,108 is: 40,662.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,661 : 102,992.12 = 27,108 : x
  2. Step 2: Convert to fraction form
    68,661/102,992.12 = 27,108/x
  3. Step 3: Cross multiply
    68,661x = 102,992.12 × 27,108
  4. Step 4: Simplify right side
    68,661x = 2,791,910,388.96
  5. Step 5: Solve for x
    x = 2,791,910,388.96/68,661
  6. Step 6: Final answer
    x = 40,662.24

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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.