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Finding the Fourth Proportional to 121.63, 182.13 and 92.77

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Solution

The fourth proportional to 121.63, 182.13 and 92.77 is: 138.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.63 : 182.13 = 92.77 : x
  2. Step 2: Convert to fraction form
    121.63/182.13 = 92.77/x
  3. Step 3: Cross multiply
    121.63x = 182.13 × 92.77
  4. Step 4: Simplify right side
    121.63x = 16,896.20
  5. Step 5: Solve for x
    x = 16,896.20/121.63
  6. Step 6: Final answer
    x = 138.91

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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.