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Finding the Fourth Proportional to 159.44, 238.90 and 113.70

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Solution

The fourth proportional to 159.44, 238.90 and 113.70 is: 170.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.44 : 238.90 = 113.70 : x
  2. Step 2: Convert to fraction form
    159.44/238.90 = 113.70/x
  3. Step 3: Cross multiply
    159.44x = 238.90 × 113.70
  4. Step 4: Simplify right side
    159.44x = 27,162.93
  5. Step 5: Solve for x
    x = 27,162.93/159.44
  6. Step 6: Final answer
    x = 170.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.