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Finding the Fourth Proportional to 135.25, 187.90 and 133.99

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Solution

The fourth proportional to 135.25, 187.90 and 133.99 is: 186.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.25 : 187.90 = 133.99 : x
  2. Step 2: Convert to fraction form
    135.25/187.90 = 133.99/x
  3. Step 3: Cross multiply
    135.25x = 187.90 × 133.99
  4. Step 4: Simplify right side
    135.25x = 25,176.67
  5. Step 5: Solve for x
    x = 25,176.67/135.25
  6. Step 6: Final answer
    x = 186.14

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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.