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Finding the Third Proportional to 43,890 and 71,307

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Solution

The third proportional to 43,890 and 71,307 is: 115,850.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,890 : 71,307 = 71,307 : x
  2. Step 2: Convert to fraction form
    43,890/71,307 = 71,307/x
  3. Step 3: Cross multiply
    43,890x = 71,307 × 71,307
  4. Step 4: Simplify right side
    43,890x = 5,084,688,249
  5. Step 5: Solve for x
    x = 5,084,688,249/43,890
  6. Step 6: Final answer
    x = 115,850.72

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Why These Related Problems?

These problems maintain the same ratio (1.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.