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Finding the Third Proportional to 66,920 and 143,500

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Solution

The third proportional to 66,920 and 143,500 is: 307,714.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,920 : 143,500 = 143,500 : x
  2. Step 2: Convert to fraction form
    66,920/143,500 = 143,500/x
  3. Step 3: Cross multiply
    66,920x = 143,500 × 143,500
  4. Step 4: Simplify right side
    66,920x = 20,592,250,000
  5. Step 5: Solve for x
    x = 20,592,250,000/66,920
  6. Step 6: Final answer
    x = 307,714.44

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.