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Finding the Third Proportional to 128,987 and 185,790

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Solution

The third proportional to 128,987 and 185,790 is: 267,607.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,987 : 185,790 = 185,790 : x
  2. Step 2: Convert to fraction form
    128,987/185,790 = 185,790/x
  3. Step 3: Cross multiply
    128,987x = 185,790 × 185,790
  4. Step 4: Simplify right side
    128,987x = 34,517,924,100
  5. Step 5: Solve for x
    x = 34,517,924,100/128,987
  6. Step 6: Final answer
    x = 267,607.78

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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.