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Finding the Third Proportional to 84,207.75 and 99,777

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Solution

The third proportional to 84,207.75 and 99,777 is: 118,224.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,207.75 : 99,777 = 99,777 : x
  2. Step 2: Convert to fraction form
    84,207.75/99,777 = 99,777/x
  3. Step 3: Cross multiply
    84,207.75x = 99,777 × 99,777
  4. Step 4: Simplify right side
    84,207.75x = 9,955,449,729
  5. Step 5: Solve for x
    x = 9,955,449,729/84,207.75
  6. Step 6: Final answer
    x = 118,224.86

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.