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Finding the Third Proportional to 128,105 and 204,649

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Solution

The third proportional to 128,105 and 204,649 is: 326,928.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,105 : 204,649 = 204,649 : x
  2. Step 2: Convert to fraction form
    128,105/204,649 = 204,649/x
  3. Step 3: Cross multiply
    128,105x = 204,649 × 204,649
  4. Step 4: Simplify right side
    128,105x = 41,881,213,201
  5. Step 5: Solve for x
    x = 41,881,213,201/128,105
  6. Step 6: Final answer
    x = 326,928.79

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.