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Finding the Third Proportional to 138,655 and 198,138

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Solution

The third proportional to 138,655 and 198,138 is: 283,139.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,655 : 198,138 = 198,138 : x
  2. Step 2: Convert to fraction form
    138,655/198,138 = 198,138/x
  3. Step 3: Cross multiply
    138,655x = 198,138 × 198,138
  4. Step 4: Simplify right side
    138,655x = 39,258,667,044
  5. Step 5: Solve for x
    x = 39,258,667,044/138,655
  6. Step 6: Final answer
    x = 283,139.21

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.