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Finding the Third Proportional to 38,289 and 81,124

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Solution

The third proportional to 38,289 and 81,124 is: 171,879.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,289 : 81,124 = 81,124 : x
  2. Step 2: Convert to fraction form
    38,289/81,124 = 81,124/x
  3. Step 3: Cross multiply
    38,289x = 81,124 × 81,124
  4. Step 4: Simplify right side
    38,289x = 6,581,103,376
  5. Step 5: Solve for x
    x = 6,581,103,376/38,289
  6. Step 6: Final answer
    x = 171,879.74

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.