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Finding the Fourth Proportional to 111.06, 166.38 and 70.56

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Solution

The fourth proportional to 111.06, 166.38 and 70.56 is: 105.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.06 : 166.38 = 70.56 : x
  2. Step 2: Convert to fraction form
    111.06/166.38 = 70.56/x
  3. Step 3: Cross multiply
    111.06x = 166.38 × 70.56
  4. Step 4: Simplify right side
    111.06x = 11,739.77
  5. Step 5: Solve for x
    x = 11,739.77/111.06
  6. Step 6: Final answer
    x = 105.71

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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.