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Finding the Third Proportional to 81,208 and 121,427

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Solution

The third proportional to 81,208 and 121,427 is: 181,564.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,208 : 121,427 = 121,427 : x
  2. Step 2: Convert to fraction form
    81,208/121,427 = 121,427/x
  3. Step 3: Cross multiply
    81,208x = 121,427 × 121,427
  4. Step 4: Simplify right side
    81,208x = 14,744,516,329
  5. Step 5: Solve for x
    x = 14,744,516,329/81,208
  6. Step 6: Final answer
    x = 181,564.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.