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Finding the Third Proportional to 126 and 198.75

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Solution

The third proportional to 126 and 198.75 is: 313.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    126 : 198.75 = 198.75 : x
  2. Step 2: Convert to fraction form
    126/198.75 = 198.75/x
  3. Step 3: Cross multiply
    126x = 198.75 × 198.75
  4. Step 4: Simplify right side
    126x = 39,501.56
  5. Step 5: Solve for x
    x = 39,501.56/126
  6. Step 6: Final answer
    x = 313.50

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These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.