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Finding the Third Proportional to 18,718 and 40,175

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Solution

The third proportional to 18,718 and 40,175 is: 86,228.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718 : 40,175 = 40,175 : x
  2. Step 2: Convert to fraction form
    18,718/40,175 = 40,175/x
  3. Step 3: Cross multiply
    18,718x = 40,175 × 40,175
  4. Step 4: Simplify right side
    18,718x = 1,614,030,625
  5. Step 5: Solve for x
    x = 1,614,030,625/18,718
  6. Step 6: Final answer
    x = 86,228.80

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.