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Finding the Fourth Proportional to 113.11, 154.65 and 108.86

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Solution

The fourth proportional to 113.11, 154.65 and 108.86 is: 148.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.11 : 154.65 = 108.86 : x
  2. Step 2: Convert to fraction form
    113.11/154.65 = 108.86/x
  3. Step 3: Cross multiply
    113.11x = 154.65 × 108.86
  4. Step 4: Simplify right side
    113.11x = 16,834.83
  5. Step 5: Solve for x
    x = 16,834.83/113.11
  6. Step 6: Final answer
    x = 148.84

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.