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Finding the Third Proportional to 121,517 and 166,878

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Solution

The third proportional to 121,517 and 166,878 is: 229,171.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,517 : 166,878 = 166,878 : x
  2. Step 2: Convert to fraction form
    121,517/166,878 = 166,878/x
  3. Step 3: Cross multiply
    121,517x = 166,878 × 166,878
  4. Step 4: Simplify right side
    121,517x = 27,848,266,884
  5. Step 5: Solve for x
    x = 27,848,266,884/121,517
  6. Step 6: Final answer
    x = 229,171.78

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.