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Finding the Third Proportional to 66,868 and 145,723

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Solution

The third proportional to 66,868 and 145,723 is: 317,568.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,868 : 145,723 = 145,723 : x
  2. Step 2: Convert to fraction form
    66,868/145,723 = 145,723/x
  3. Step 3: Cross multiply
    66,868x = 145,723 × 145,723
  4. Step 4: Simplify right side
    66,868x = 21,235,192,729
  5. Step 5: Solve for x
    x = 21,235,192,729/66,868
  6. Step 6: Final answer
    x = 317,568.83

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.