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Finding the Third Proportional to 137,128 and 211,914

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Solution

The third proportional to 137,128 and 211,914 is: 327,486.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,128 : 211,914 = 211,914 : x
  2. Step 2: Convert to fraction form
    137,128/211,914 = 211,914/x
  3. Step 3: Cross multiply
    137,128x = 211,914 × 211,914
  4. Step 4: Simplify right side
    137,128x = 44,907,543,396
  5. Step 5: Solve for x
    x = 44,907,543,396/137,128
  6. Step 6: Final answer
    x = 327,486.31

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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.