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Finding the Fourth Proportional to 115.25, 158.84 and 106.55

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Solution

The fourth proportional to 115.25, 158.84 and 106.55 is: 146.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.25 : 158.84 = 106.55 : x
  2. Step 2: Convert to fraction form
    115.25/158.84 = 106.55/x
  3. Step 3: Cross multiply
    115.25x = 158.84 × 106.55
  4. Step 4: Simplify right side
    115.25x = 16,923.87
  5. Step 5: Solve for x
    x = 16,923.87/115.25
  6. Step 6: Final answer
    x = 146.84

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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.