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Finding the Fourth Proportional to 133.65, 199.29 and 126.36

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Solution

The fourth proportional to 133.65, 199.29 and 126.36 is: 188.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.65 : 199.29 = 126.36 : x
  2. Step 2: Convert to fraction form
    133.65/199.29 = 126.36/x
  3. Step 3: Cross multiply
    133.65x = 199.29 × 126.36
  4. Step 4: Simplify right side
    133.65x = 25,182.76
  5. Step 5: Solve for x
    x = 25,182.76/133.65
  6. Step 6: Final answer
    x = 188.42

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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.