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Finding the Fourth Proportional to 122.62, 183.80 and 108.16

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Solution

The fourth proportional to 122.62, 183.80 and 108.16 is: 162.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.62 : 183.80 = 108.16 : x
  2. Step 2: Convert to fraction form
    122.62/183.80 = 108.16/x
  3. Step 3: Cross multiply
    122.62x = 183.80 × 108.16
  4. Step 4: Simplify right side
    122.62x = 19,879.81
  5. Step 5: Solve for x
    x = 19,879.81/122.62
  6. Step 6: Final answer
    x = 162.13

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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.