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Finding the Third Proportional to 139.92 and 201.87

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Solution

The third proportional to 139.92 and 201.87 is: 291.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.92 : 201.87 = 201.87 : x
  2. Step 2: Convert to fraction form
    139.92/201.87 = 201.87/x
  3. Step 3: Cross multiply
    139.92x = 201.87 × 201.87
  4. Step 4: Simplify right side
    139.92x = 40,750.36
  5. Step 5: Solve for x
    x = 40,750.36/139.92
  6. Step 6: Final answer
    x = 291.24

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.