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Finding the Fourth Proportional to 135.84, 202.78 and 126.73

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Solution

The fourth proportional to 135.84, 202.78 and 126.73 is: 189.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.84 : 202.78 = 126.73 : x
  2. Step 2: Convert to fraction form
    135.84/202.78 = 126.73/x
  3. Step 3: Cross multiply
    135.84x = 202.78 × 126.73
  4. Step 4: Simplify right side
    135.84x = 25,698.31
  5. Step 5: Solve for x
    x = 25,698.31/135.84
  6. Step 6: Final answer
    x = 189.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.