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Finding the Fourth Proportional to 136.61, 189 and 133.70

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Solution

The fourth proportional to 136.61, 189 and 133.70 is: 184.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.61 : 189 = 133.70 : x
  2. Step 2: Convert to fraction form
    136.61/189 = 133.70/x
  3. Step 3: Cross multiply
    136.61x = 189 × 133.70
  4. Step 4: Simplify right side
    136.61x = 25,268.36
  5. Step 5: Solve for x
    x = 25,268.36/136.61
  6. Step 6: Final answer
    x = 184.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.