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Finding the Third Proportional to 20,108 and 43,239

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Solution

The third proportional to 20,108 and 43,239 is: 92,978.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108 : 43,239 = 43,239 : x
  2. Step 2: Convert to fraction form
    20,108/43,239 = 43,239/x
  3. Step 3: Cross multiply
    20,108x = 43,239 × 43,239
  4. Step 4: Simplify right side
    20,108x = 1,869,611,121
  5. Step 5: Solve for x
    x = 1,869,611,121/20,108
  6. Step 6: Final answer
    x = 92,978.47

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.