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Finding the Third Proportional to 39,885.50 and 87,015

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Solution

The third proportional to 39,885.50 and 87,015 is: 189,833.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,885.50 : 87,015 = 87,015 : x
  2. Step 2: Convert to fraction form
    39,885.50/87,015 = 87,015/x
  3. Step 3: Cross multiply
    39,885.50x = 87,015 × 87,015
  4. Step 4: Simplify right side
    39,885.50x = 7,571,610,225
  5. Step 5: Solve for x
    x = 7,571,610,225/39,885.50
  6. Step 6: Final answer
    x = 189,833.65

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.