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Finding the Fourth Proportional to 133.26, 198.72 and 130.02

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Solution

The fourth proportional to 133.26, 198.72 and 130.02 is: 193.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.26 : 198.72 = 130.02 : x
  2. Step 2: Convert to fraction form
    133.26/198.72 = 130.02/x
  3. Step 3: Cross multiply
    133.26x = 198.72 × 130.02
  4. Step 4: Simplify right side
    133.26x = 25,837.57
  5. Step 5: Solve for x
    x = 25,837.57/133.26
  6. Step 6: Final answer
    x = 193.89

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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.