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Finding the Third Proportional to 128,885 and 197,180

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Solution

The third proportional to 128,885 and 197,180 is: 301,663.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,885 : 197,180 = 197,180 : x
  2. Step 2: Convert to fraction form
    128,885/197,180 = 197,180/x
  3. Step 3: Cross multiply
    128,885x = 197,180 × 197,180
  4. Step 4: Simplify right side
    128,885x = 38,879,952,400
  5. Step 5: Solve for x
    x = 38,879,952,400/128,885
  6. Step 6: Final answer
    x = 301,663.91

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.