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Finding the Third Proportional to 91,880 and 138,357

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Solution

The third proportional to 91,880 and 138,357 is: 208,344.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,880 : 138,357 = 138,357 : x
  2. Step 2: Convert to fraction form
    91,880/138,357 = 138,357/x
  3. Step 3: Cross multiply
    91,880x = 138,357 × 138,357
  4. Step 4: Simplify right side
    91,880x = 19,142,659,449
  5. Step 5: Solve for x
    x = 19,142,659,449/91,880
  6. Step 6: Final answer
    x = 208,344.14

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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.