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Finding the Fourth Proportional to 112.16, 155.42 and 104.96

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Solution

The fourth proportional to 112.16, 155.42 and 104.96 is: 145.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.16 : 155.42 = 104.96 : x
  2. Step 2: Convert to fraction form
    112.16/155.42 = 104.96/x
  3. Step 3: Cross multiply
    112.16x = 155.42 × 104.96
  4. Step 4: Simplify right side
    112.16x = 16,312.88
  5. Step 5: Solve for x
    x = 16,312.88/112.16
  6. Step 6: Final answer
    x = 145.44

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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.