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Finding the Third Proportional to 127,912 and 198,612

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Solution

The third proportional to 127,912 and 198,612 is: 308,389.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,912 : 198,612 = 198,612 : x
  2. Step 2: Convert to fraction form
    127,912/198,612 = 198,612/x
  3. Step 3: Cross multiply
    127,912x = 198,612 × 198,612
  4. Step 4: Simplify right side
    127,912x = 39,446,726,544
  5. Step 5: Solve for x
    x = 39,446,726,544/127,912
  6. Step 6: Final answer
    x = 308,389.57

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.