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Finding the Fourth Proportional to 189.96, 261.99 and 134.66

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Solution

The fourth proportional to 189.96, 261.99 and 134.66 is: 185.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.96 : 261.99 = 134.66 : x
  2. Step 2: Convert to fraction form
    189.96/261.99 = 134.66/x
  3. Step 3: Cross multiply
    189.96x = 261.99 × 134.66
  4. Step 4: Simplify right side
    189.96x = 35,278.26
  5. Step 5: Solve for x
    x = 35,278.26/189.96
  6. Step 6: Final answer
    x = 185.71

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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.