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Finding the Fourth Proportional to 122.07, 183.15 and 83.60

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Solution

The fourth proportional to 122.07, 183.15 and 83.60 is: 125.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.07 : 183.15 = 83.60 : x
  2. Step 2: Convert to fraction form
    122.07/183.15 = 83.60/x
  3. Step 3: Cross multiply
    122.07x = 183.15 × 83.60
  4. Step 4: Simplify right side
    122.07x = 15,310.42
  5. Step 5: Solve for x
    x = 15,310.42/122.07
  6. Step 6: Final answer
    x = 125.42

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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.