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Finding the Third Proportional to 81,263.50 and 107,855

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Solution

The third proportional to 81,263.50 and 107,855 is: 143,147.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,263.50 : 107,855 = 107,855 : x
  2. Step 2: Convert to fraction form
    81,263.50/107,855 = 107,855/x
  3. Step 3: Cross multiply
    81,263.50x = 107,855 × 107,855
  4. Step 4: Simplify right side
    81,263.50x = 11,632,701,025
  5. Step 5: Solve for x
    x = 11,632,701,025/81,263.50
  6. Step 6: Final answer
    x = 143,147.92

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.