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Finding the Fourth Proportional to 112.92, 155 and 110.88

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Solution

The fourth proportional to 112.92, 155 and 110.88 is: 152.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.92 : 155 = 110.88 : x
  2. Step 2: Convert to fraction form
    112.92/155 = 110.88/x
  3. Step 3: Cross multiply
    112.92x = 155 × 110.88
  4. Step 4: Simplify right side
    112.92x = 17,186.40
  5. Step 5: Solve for x
    x = 17,186.40/112.92
  6. Step 6: Final answer
    x = 152.20

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.