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Finding the Third Proportional to 91,379 and 138,041

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Solution

The third proportional to 91,379 and 138,041 is: 208,530.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,379 : 138,041 = 138,041 : x
  2. Step 2: Convert to fraction form
    91,379/138,041 = 138,041/x
  3. Step 3: Cross multiply
    91,379x = 138,041 × 138,041
  4. Step 4: Simplify right side
    91,379x = 19,055,317,681
  5. Step 5: Solve for x
    x = 19,055,317,681/91,379
  6. Step 6: Final answer
    x = 208,530.60

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.