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Finding the Fourth Proportional to 122.45, 183.78 and 96.84

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Solution

The fourth proportional to 122.45, 183.78 and 96.84 is: 145.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.45 : 183.78 = 96.84 : x
  2. Step 2: Convert to fraction form
    122.45/183.78 = 96.84/x
  3. Step 3: Cross multiply
    122.45x = 183.78 × 96.84
  4. Step 4: Simplify right side
    122.45x = 17,797.26
  5. Step 5: Solve for x
    x = 17,797.26/122.45
  6. Step 6: Final answer
    x = 145.35

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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.