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Finding the Fourth Proportional to 110.79, 166.23 and 53.75

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Solution

The fourth proportional to 110.79, 166.23 and 53.75 is: 80.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.79 : 166.23 = 53.75 : x
  2. Step 2: Convert to fraction form
    110.79/166.23 = 53.75/x
  3. Step 3: Cross multiply
    110.79x = 166.23 × 53.75
  4. Step 4: Simplify right side
    110.79x = 8,934.59
  5. Step 5: Solve for x
    x = 8,934.59/110.79
  6. Step 6: Final answer
    x = 80.64

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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.