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Finding the Third Proportional to 31,155 and 66,204.75

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Solution

The third proportional to 31,155 and 66,204.75 is: 140,685.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,155 : 66,204.75 = 66,204.75 : x
  2. Step 2: Convert to fraction form
    31,155/66,204.75 = 66,204.75/x
  3. Step 3: Cross multiply
    31,155x = 66,204.75 × 66,204.75
  4. Step 4: Simplify right side
    31,155x = 4,383,068,922.56
  5. Step 5: Solve for x
    x = 4,383,068,922.56/31,155
  6. Step 6: Final answer
    x = 140,685.89

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.