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Finding the Fourth Proportional to 122.29, 183.51 and 111.51

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Solution

The fourth proportional to 122.29, 183.51 and 111.51 is: 167.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.29 : 183.51 = 111.51 : x
  2. Step 2: Convert to fraction form
    122.29/183.51 = 111.51/x
  3. Step 3: Cross multiply
    122.29x = 183.51 × 111.51
  4. Step 4: Simplify right side
    122.29x = 20,463.20
  5. Step 5: Solve for x
    x = 20,463.20/122.29
  6. Step 6: Final answer
    x = 167.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.