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Finding the Third Proportional to 143,209,379 and 212,128,918

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Solution

The third proportional to 143,209,379 and 212,128,918 is: 314,215,997.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,209,379 : 212,128,918 = 212,128,918 : x
  2. Step 2: Convert to fraction form
    143,209,379/212,128,918 = 212,128,918/x
  3. Step 3: Cross multiply
    143,209,379x = 212,128,918 × 212,128,918
  4. Step 4: Simplify right side
    143,209,379x = 44,998,677,851,850,720
  5. Step 5: Solve for x
    x = 44,998,677,851,850,720/143,209,379
  6. Step 6: Final answer
    x = 314,215,997.35

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.