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Finding the Fourth Proportional to 115.57, 158.83 and 112.33

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Solution

The fourth proportional to 115.57, 158.83 and 112.33 is: 154.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.57 : 158.83 = 112.33 : x
  2. Step 2: Convert to fraction form
    115.57/158.83 = 112.33/x
  3. Step 3: Cross multiply
    115.57x = 158.83 × 112.33
  4. Step 4: Simplify right side
    115.57x = 17,840.58
  5. Step 5: Solve for x
    x = 17,840.58/115.57
  6. Step 6: Final answer
    x = 154.38

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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.