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Finding the Fourth Proportional to 111.92, 155.06 and 110.36

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Solution

The fourth proportional to 111.92, 155.06 and 110.36 is: 152.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.92 : 155.06 = 110.36 : x
  2. Step 2: Convert to fraction form
    111.92/155.06 = 110.36/x
  3. Step 3: Cross multiply
    111.92x = 155.06 × 110.36
  4. Step 4: Simplify right side
    111.92x = 17,112.42
  5. Step 5: Solve for x
    x = 17,112.42/111.92
  6. Step 6: Final answer
    x = 152.90

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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.