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Finding the Fourth Proportional to 112.13, 154.25 and 107.69

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Solution

The fourth proportional to 112.13, 154.25 and 107.69 is: 148.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.13 : 154.25 = 107.69 : x
  2. Step 2: Convert to fraction form
    112.13/154.25 = 107.69/x
  3. Step 3: Cross multiply
    112.13x = 154.25 × 107.69
  4. Step 4: Simplify right side
    112.13x = 16,611.18
  5. Step 5: Solve for x
    x = 16,611.18/112.13
  6. Step 6: Final answer
    x = 148.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.