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Finding the Fourth Proportional to 112.44, 155.07 and 79.23

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Solution

The fourth proportional to 112.44, 155.07 and 79.23 is: 109.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.44 : 155.07 = 79.23 : x
  2. Step 2: Convert to fraction form
    112.44/155.07 = 79.23/x
  3. Step 3: Cross multiply
    112.44x = 155.07 × 79.23
  4. Step 4: Simplify right side
    112.44x = 12,286.20
  5. Step 5: Solve for x
    x = 12,286.20/112.44
  6. Step 6: Final answer
    x = 109.27

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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.