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Finding the Third Proportional to 40,306 and 87,781

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Solution

The third proportional to 40,306 and 87,781 is: 191,175.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,306 : 87,781 = 87,781 : x
  2. Step 2: Convert to fraction form
    40,306/87,781 = 87,781/x
  3. Step 3: Cross multiply
    40,306x = 87,781 × 87,781
  4. Step 4: Simplify right side
    40,306x = 7,705,503,961
  5. Step 5: Solve for x
    x = 7,705,503,961/40,306
  6. Step 6: Final answer
    x = 191,175.11

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.