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Finding the Fourth Proportional to 111.68, 166.69 and 104.84

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Solution

The fourth proportional to 111.68, 166.69 and 104.84 is: 156.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.68 : 166.69 = 104.84 : x
  2. Step 2: Convert to fraction form
    111.68/166.69 = 104.84/x
  3. Step 3: Cross multiply
    111.68x = 166.69 × 104.84
  4. Step 4: Simplify right side
    111.68x = 17,474.68
  5. Step 5: Solve for x
    x = 17,474.68/111.68
  6. Step 6: Final answer
    x = 156.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.