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Finding the Third Proportional to 128,728 and 204,740

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Solution

The third proportional to 128,728 and 204,740 is: 325,635.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,728 : 204,740 = 204,740 : x
  2. Step 2: Convert to fraction form
    128,728/204,740 = 204,740/x
  3. Step 3: Cross multiply
    128,728x = 204,740 × 204,740
  4. Step 4: Simplify right side
    128,728x = 41,918,467,600
  5. Step 5: Solve for x
    x = 41,918,467,600/128,728
  6. Step 6: Final answer
    x = 325,635.97

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.