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Finding the Third Proportional to 137,724 and 212,661

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Solution

The third proportional to 137,724 and 212,661 is: 328,371.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,724 : 212,661 = 212,661 : x
  2. Step 2: Convert to fraction form
    137,724/212,661 = 212,661/x
  3. Step 3: Cross multiply
    137,724x = 212,661 × 212,661
  4. Step 4: Simplify right side
    137,724x = 45,224,700,921
  5. Step 5: Solve for x
    x = 45,224,700,921/137,724
  6. Step 6: Final answer
    x = 328,371.97

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.