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Finding the Third Proportional to 80,420 and 171,885

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Solution

The third proportional to 80,420 and 171,885 is: 367,376.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,420 : 171,885 = 171,885 : x
  2. Step 2: Convert to fraction form
    80,420/171,885 = 171,885/x
  3. Step 3: Cross multiply
    80,420x = 171,885 × 171,885
  4. Step 4: Simplify right side
    80,420x = 29,544,453,225
  5. Step 5: Solve for x
    x = 29,544,453,225/80,420
  6. Step 6: Final answer
    x = 367,376.94

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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.