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Finding the Fourth Proportional to 122.99, 184.26 and 45.91

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Solution

The fourth proportional to 122.99, 184.26 and 45.91 is: 68.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.99 : 184.26 = 45.91 : x
  2. Step 2: Convert to fraction form
    122.99/184.26 = 45.91/x
  3. Step 3: Cross multiply
    122.99x = 184.26 × 45.91
  4. Step 4: Simplify right side
    122.99x = 8,458.92
  5. Step 5: Solve for x
    x = 8,458.92/122.99
  6. Step 6: Final answer
    x = 68.78

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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.