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Finding the Third Proportional to 81,087 and 177,120

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Solution

The third proportional to 81,087 and 177,120 is: 386,886.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,087 : 177,120 = 177,120 : x
  2. Step 2: Convert to fraction form
    81,087/177,120 = 177,120/x
  3. Step 3: Cross multiply
    81,087x = 177,120 × 177,120
  4. Step 4: Simplify right side
    81,087x = 31,371,494,400
  5. Step 5: Solve for x
    x = 31,371,494,400/81,087
  6. Step 6: Final answer
    x = 386,886.85

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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.