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Finding the Third Proportional to 68,610 and 103,080

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Solution

The third proportional to 68,610 and 103,080 is: 154,867.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,610 : 103,080 = 103,080 : x
  2. Step 2: Convert to fraction form
    68,610/103,080 = 103,080/x
  3. Step 3: Cross multiply
    68,610x = 103,080 × 103,080
  4. Step 4: Simplify right side
    68,610x = 10,625,486,400
  5. Step 5: Solve for x
    x = 10,625,486,400/68,610
  6. Step 6: Final answer
    x = 154,867.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.