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Finding the Third Proportional to 91,544 and 138,607

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Solution

The third proportional to 91,544 and 138,607 is: 209,865.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,544 : 138,607 = 138,607 : x
  2. Step 2: Convert to fraction form
    91,544/138,607 = 138,607/x
  3. Step 3: Cross multiply
    91,544x = 138,607 × 138,607
  4. Step 4: Simplify right side
    91,544x = 19,211,900,449
  5. Step 5: Solve for x
    x = 19,211,900,449/91,544
  6. Step 6: Final answer
    x = 209,865.21

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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.