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Finding the Fourth Proportional to 135.72, 188.58 and 133.98

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Solution

The fourth proportional to 135.72, 188.58 and 133.98 is: 186.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.72 : 188.58 = 133.98 : x
  2. Step 2: Convert to fraction form
    135.72/188.58 = 133.98/x
  3. Step 3: Cross multiply
    135.72x = 188.58 × 133.98
  4. Step 4: Simplify right side
    135.72x = 25,265.95
  5. Step 5: Solve for x
    x = 25,265.95/135.72
  6. Step 6: Final answer
    x = 186.16

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.