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Finding the Third Proportional to 81,137 and 178,258

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Solution

The third proportional to 81,137 and 178,258 is: 391,632.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,137 : 178,258 = 178,258 : x
  2. Step 2: Convert to fraction form
    81,137/178,258 = 178,258/x
  3. Step 3: Cross multiply
    81,137x = 178,258 × 178,258
  4. Step 4: Simplify right side
    81,137x = 31,775,914,564
  5. Step 5: Solve for x
    x = 31,775,914,564/81,137
  6. Step 6: Final answer
    x = 391,632.85

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.