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Finding the Fourth Proportional to 118.44, 164.28 and 113.40

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Solution

The fourth proportional to 118.44, 164.28 and 113.40 is: 157.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.44 : 164.28 = 113.40 : x
  2. Step 2: Convert to fraction form
    118.44/164.28 = 113.40/x
  3. Step 3: Cross multiply
    118.44x = 164.28 × 113.40
  4. Step 4: Simplify right side
    118.44x = 18,629.35
  5. Step 5: Solve for x
    x = 18,629.35/118.44
  6. Step 6: Final answer
    x = 157.29

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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.