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Finding the Third Proportional to 15,979 and 35,138

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Solution

The third proportional to 15,979 and 35,138 is: 77,268.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,979 : 35,138 = 35,138 : x
  2. Step 2: Convert to fraction form
    15,979/35,138 = 35,138/x
  3. Step 3: Cross multiply
    15,979x = 35,138 × 35,138
  4. Step 4: Simplify right side
    15,979x = 1,234,679,044
  5. Step 5: Solve for x
    x = 1,234,679,044/15,979
  6. Step 6: Final answer
    x = 77,268.86

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.