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Finding the Fourth Proportional to 122.79, 184.09 and 50.61

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Solution

The fourth proportional to 122.79, 184.09 and 50.61 is: 75.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.79 : 184.09 = 50.61 : x
  2. Step 2: Convert to fraction form
    122.79/184.09 = 50.61/x
  3. Step 3: Cross multiply
    122.79x = 184.09 × 50.61
  4. Step 4: Simplify right side
    122.79x = 9,315.75
  5. Step 5: Solve for x
    x = 9,315.75/122.79
  6. Step 6: Final answer
    x = 75.87

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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.