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Finding the Third Proportional to 40,278 and 87,471

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Solution

The third proportional to 40,278 and 87,471 is: 189,959.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,278 : 87,471 = 87,471 : x
  2. Step 2: Convert to fraction form
    40,278/87,471 = 87,471/x
  3. Step 3: Cross multiply
    40,278x = 87,471 × 87,471
  4. Step 4: Simplify right side
    40,278x = 7,651,175,841
  5. Step 5: Solve for x
    x = 7,651,175,841/40,278
  6. Step 6: Final answer
    x = 189,959.18

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.