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Finding the Fourth Proportional to 111.36, 166.26 and 100.56

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Solution

The fourth proportional to 111.36, 166.26 and 100.56 is: 150.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.36 : 166.26 = 100.56 : x
  2. Step 2: Convert to fraction form
    111.36/166.26 = 100.56/x
  3. Step 3: Cross multiply
    111.36x = 166.26 × 100.56
  4. Step 4: Simplify right side
    111.36x = 16,719.11
  5. Step 5: Solve for x
    x = 16,719.11/111.36
  6. Step 6: Final answer
    x = 150.14

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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.