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Finding the Fourth Proportional to 122.81, 183.27 and 109.18

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Solution

The fourth proportional to 122.81, 183.27 and 109.18 is: 162.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.81 : 183.27 = 109.18 : x
  2. Step 2: Convert to fraction form
    122.81/183.27 = 109.18/x
  3. Step 3: Cross multiply
    122.81x = 183.27 × 109.18
  4. Step 4: Simplify right side
    122.81x = 20,007.96
  5. Step 5: Solve for x
    x = 20,007.96/122.81
  6. Step 6: Final answer
    x = 162.92

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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.