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Finding the Fourth Proportional to 122.76, 183.08 and 105.75

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Solution

The fourth proportional to 122.76, 183.08 and 105.75 is: 157.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.76 : 183.08 = 105.75 : x
  2. Step 2: Convert to fraction form
    122.76/183.08 = 105.75/x
  3. Step 3: Cross multiply
    122.76x = 183.08 × 105.75
  4. Step 4: Simplify right side
    122.76x = 19,360.18
  5. Step 5: Solve for x
    x = 19,360.18/122.76
  6. Step 6: Final answer
    x = 157.71

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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.