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Finding the Third Proportional to 66,970 and 103,811

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Solution

The third proportional to 66,970 and 103,811 is: 160,918.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,970 : 103,811 = 103,811 : x
  2. Step 2: Convert to fraction form
    66,970/103,811 = 103,811/x
  3. Step 3: Cross multiply
    66,970x = 103,811 × 103,811
  4. Step 4: Simplify right side
    66,970x = 10,776,723,721
  5. Step 5: Solve for x
    x = 10,776,723,721/66,970
  6. Step 6: Final answer
    x = 160,918.68

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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.