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Finding the Third Proportional to 18,109 and 40,105

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Solution

The third proportional to 18,109 and 40,105 is: 88,818.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,109 : 40,105 = 40,105 : x
  2. Step 2: Convert to fraction form
    18,109/40,105 = 40,105/x
  3. Step 3: Cross multiply
    18,109x = 40,105 × 40,105
  4. Step 4: Simplify right side
    18,109x = 1,608,411,025
  5. Step 5: Solve for x
    x = 1,608,411,025/18,109
  6. Step 6: Final answer
    x = 88,818.32

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.