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Finding the Third Proportional to 66,676 and 143,720

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Solution

The third proportional to 66,676 and 143,720 is: 309,788.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,676 : 143,720 = 143,720 : x
  2. Step 2: Convert to fraction form
    66,676/143,720 = 143,720/x
  3. Step 3: Cross multiply
    66,676x = 143,720 × 143,720
  4. Step 4: Simplify right side
    66,676x = 20,655,438,400
  5. Step 5: Solve for x
    x = 20,655,438,400/66,676
  6. Step 6: Final answer
    x = 309,788.21

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.