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Finding the Third Proportional to 18,170 and 39,123

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Solution

The third proportional to 18,170 and 39,123 is: 84,238.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,170 : 39,123 = 39,123 : x
  2. Step 2: Convert to fraction form
    18,170/39,123 = 39,123/x
  3. Step 3: Cross multiply
    18,170x = 39,123 × 39,123
  4. Step 4: Simplify right side
    18,170x = 1,530,609,129
  5. Step 5: Solve for x
    x = 1,530,609,129/18,170
  6. Step 6: Final answer
    x = 84,238.26

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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.