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Finding the Third Proportional to 61,387 and 131,486

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Solution

The third proportional to 61,387 and 131,486 is: 281,632.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,387 : 131,486 = 131,486 : x
  2. Step 2: Convert to fraction form
    61,387/131,486 = 131,486/x
  3. Step 3: Cross multiply
    61,387x = 131,486 × 131,486
  4. Step 4: Simplify right side
    61,387x = 17,288,568,196
  5. Step 5: Solve for x
    x = 17,288,568,196/61,387
  6. Step 6: Final answer
    x = 281,632.40

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.