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Finding the Fourth Proportional to 110.22, 152.05 and 68.78

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Solution

The fourth proportional to 110.22, 152.05 and 68.78 is: 94.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.22 : 152.05 = 68.78 : x
  2. Step 2: Convert to fraction form
    110.22/152.05 = 68.78/x
  3. Step 3: Cross multiply
    110.22x = 152.05 × 68.78
  4. Step 4: Simplify right side
    110.22x = 10,458.00
  5. Step 5: Solve for x
    x = 10,458.00/110.22
  6. Step 6: Final answer
    x = 94.88

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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.