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Finding the Third Proportional to 20.25 and 49.50

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Solution

The third proportional to 20.25 and 49.50 is: 121

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.25 : 49.50 = 49.50 : x
  2. Step 2: Convert to fraction form
    20.25/49.50 = 49.50/x
  3. Step 3: Cross multiply
    20.25x = 49.50 × 49.50
  4. Step 4: Simplify right side
    20.25x = 2,450.25
  5. Step 5: Solve for x
    x = 2,450.25/20.25
  6. Step 6: Final answer
    x = 121

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Why These Related Problems?

These problems maintain the same ratio (2.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.