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Finding the Fourth Proportional to 122.58, 182.79 and 116.91

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Solution

The fourth proportional to 122.58, 182.79 and 116.91 is: 174.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.58 : 182.79 = 116.91 : x
  2. Step 2: Convert to fraction form
    122.58/182.79 = 116.91/x
  3. Step 3: Cross multiply
    122.58x = 182.79 × 116.91
  4. Step 4: Simplify right side
    122.58x = 21,369.98
  5. Step 5: Solve for x
    x = 21,369.98/122.58
  6. Step 6: Final answer
    x = 174.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.