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Finding the Fourth Proportional to 110.88, 166.24 and 56.76

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Solution

The fourth proportional to 110.88, 166.24 and 56.76 is: 85.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.88 : 166.24 = 56.76 : x
  2. Step 2: Convert to fraction form
    110.88/166.24 = 56.76/x
  3. Step 3: Cross multiply
    110.88x = 166.24 × 56.76
  4. Step 4: Simplify right side
    110.88x = 9,435.78
  5. Step 5: Solve for x
    x = 9,435.78/110.88
  6. Step 6: Final answer
    x = 85.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.