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Finding the Third Proportional to 81,468 and 121,698

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Solution

The third proportional to 81,468 and 121,698 is: 181,794.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,468 : 121,698 = 121,698 : x
  2. Step 2: Convert to fraction form
    81,468/121,698 = 121,698/x
  3. Step 3: Cross multiply
    81,468x = 121,698 × 121,698
  4. Step 4: Simplify right side
    81,468x = 14,810,403,204
  5. Step 5: Solve for x
    x = 14,810,403,204/81,468
  6. Step 6: Final answer
    x = 181,794.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.