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Finding the Third Proportional to 28,618.50 and 43,782

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Solution

The third proportional to 28,618.50 and 43,782 is: 66,979.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,618.50 : 43,782 = 43,782 : x
  2. Step 2: Convert to fraction form
    28,618.50/43,782 = 43,782/x
  3. Step 3: Cross multiply
    28,618.50x = 43,782 × 43,782
  4. Step 4: Simplify right side
    28,618.50x = 1,916,863,524
  5. Step 5: Solve for x
    x = 1,916,863,524/28,618.50
  6. Step 6: Final answer
    x = 66,979.87

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.