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Finding the Third Proportional to 18,715.78 and 40,169.81

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Solution

The third proportional to 18,715.78 and 40,169.81 is: 86,216.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,715.78 : 40,169.81 = 40,169.81 : x
  2. Step 2: Convert to fraction form
    18,715.78/40,169.81 = 40,169.81/x
  3. Step 3: Cross multiply
    18,715.78x = 40,169.81 × 40,169.81
  4. Step 4: Simplify right side
    18,715.78x = 1,613,613,836.29
  5. Step 5: Solve for x
    x = 1,613,613,836.29/18,715.78
  6. Step 6: Final answer
    x = 86,216.75

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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.