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Finding the Fourth Proportional to 134.42, 185.39 and 113.66

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Solution

The fourth proportional to 134.42, 185.39 and 113.66 is: 156.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.42 : 185.39 = 113.66 : x
  2. Step 2: Convert to fraction form
    134.42/185.39 = 113.66/x
  3. Step 3: Cross multiply
    134.42x = 185.39 × 113.66
  4. Step 4: Simplify right side
    134.42x = 21,071.05
  5. Step 5: Solve for x
    x = 21,071.05/134.42
  6. Step 6: Final answer
    x = 156.76

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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.