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Finding the Third Proportional to 43,211 and 65,690

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Solution

The third proportional to 43,211 and 65,690 is: 99,862.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,211 : 65,690 = 65,690 : x
  2. Step 2: Convert to fraction form
    43,211/65,690 = 65,690/x
  3. Step 3: Cross multiply
    43,211x = 65,690 × 65,690
  4. Step 4: Simplify right side
    43,211x = 4,315,176,100
  5. Step 5: Solve for x
    x = 4,315,176,100/43,211
  6. Step 6: Final answer
    x = 99,862.91

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.