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Finding the Third Proportional to 111,990 and 161,361

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Solution

The third proportional to 111,990 and 161,361 is: 232,497.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,990 : 161,361 = 161,361 : x
  2. Step 2: Convert to fraction form
    111,990/161,361 = 161,361/x
  3. Step 3: Cross multiply
    111,990x = 161,361 × 161,361
  4. Step 4: Simplify right side
    111,990x = 26,037,372,321
  5. Step 5: Solve for x
    x = 26,037,372,321/111,990
  6. Step 6: Final answer
    x = 232,497.30

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.