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Finding the Third Proportional to 15,108 and 31,278

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Solution

The third proportional to 15,108 and 31,278 is: 64,754.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,108 : 31,278 = 31,278 : x
  2. Step 2: Convert to fraction form
    15,108/31,278 = 31,278/x
  3. Step 3: Cross multiply
    15,108x = 31,278 × 31,278
  4. Step 4: Simplify right side
    15,108x = 978,313,284
  5. Step 5: Solve for x
    x = 978,313,284/15,108
  6. Step 6: Final answer
    x = 64,754.65

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.