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Finding the Third Proportional to 135,128 and 211,974

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Solution

The third proportional to 135,128 and 211,974 is: 332,521.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,128 : 211,974 = 211,974 : x
  2. Step 2: Convert to fraction form
    135,128/211,974 = 211,974/x
  3. Step 3: Cross multiply
    135,128x = 211,974 × 211,974
  4. Step 4: Simplify right side
    135,128x = 44,932,976,676
  5. Step 5: Solve for x
    x = 44,932,976,676/135,128
  6. Step 6: Final answer
    x = 332,521.58

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.