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Finding the Fourth Proportional to 122.63, 183.71 and 103.49

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Solution

The fourth proportional to 122.63, 183.71 and 103.49 is: 155.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.63 : 183.71 = 103.49 : x
  2. Step 2: Convert to fraction form
    122.63/183.71 = 103.49/x
  3. Step 3: Cross multiply
    122.63x = 183.71 × 103.49
  4. Step 4: Simplify right side
    122.63x = 19,012.87
  5. Step 5: Solve for x
    x = 19,012.87/122.63
  6. Step 6: Final answer
    x = 155.04

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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.