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Finding the Third Proportional to 101,990 and 155,907

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Solution

The third proportional to 101,990 and 155,907 is: 238,327.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,990 : 155,907 = 155,907 : x
  2. Step 2: Convert to fraction form
    101,990/155,907 = 155,907/x
  3. Step 3: Cross multiply
    101,990x = 155,907 × 155,907
  4. Step 4: Simplify right side
    101,990x = 24,306,992,649
  5. Step 5: Solve for x
    x = 24,306,992,649/101,990
  6. Step 6: Final answer
    x = 238,327.21

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.