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Finding the Third Proportional to 81,220 and 164,672

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Solution

The third proportional to 81,220 and 164,672 is: 333,869.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,220 : 164,672 = 164,672 : x
  2. Step 2: Convert to fraction form
    81,220/164,672 = 164,672/x
  3. Step 3: Cross multiply
    81,220x = 164,672 × 164,672
  4. Step 4: Simplify right side
    81,220x = 27,116,867,584
  5. Step 5: Solve for x
    x = 27,116,867,584/81,220
  6. Step 6: Final answer
    x = 333,869.34

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.