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Finding the Third Proportional to 39,772 and 87,200

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Solution

The third proportional to 39,772 and 87,200 is: 191,185.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,772 : 87,200 = 87,200 : x
  2. Step 2: Convert to fraction form
    39,772/87,200 = 87,200/x
  3. Step 3: Cross multiply
    39,772x = 87,200 × 87,200
  4. Step 4: Simplify right side
    39,772x = 7,603,840,000
  5. Step 5: Solve for x
    x = 7,603,840,000/39,772
  6. Step 6: Final answer
    x = 191,185.76

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.