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Finding the Third Proportional to 66,890 and 103,629

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Solution

The third proportional to 66,890 and 103,629 is: 160,546.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,890 : 103,629 = 103,629 : x
  2. Step 2: Convert to fraction form
    66,890/103,629 = 103,629/x
  3. Step 3: Cross multiply
    66,890x = 103,629 × 103,629
  4. Step 4: Simplify right side
    66,890x = 10,738,969,641
  5. Step 5: Solve for x
    x = 10,738,969,641/66,890
  6. Step 6: Final answer
    x = 160,546.71

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.