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Finding the Third Proportional to 128,869 and 197,132

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Solution

The third proportional to 128,869 and 197,132 is: 301,554.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,869 : 197,132 = 197,132 : x
  2. Step 2: Convert to fraction form
    128,869/197,132 = 197,132/x
  3. Step 3: Cross multiply
    128,869x = 197,132 × 197,132
  4. Step 4: Simplify right side
    128,869x = 38,861,025,424
  5. Step 5: Solve for x
    x = 38,861,025,424/128,869
  6. Step 6: Final answer
    x = 301,554.49

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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.