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Finding the Fourth Proportional to 155.27, 214.20 and 120.26

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Solution

The fourth proportional to 155.27, 214.20 and 120.26 is: 165.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.27 : 214.20 = 120.26 : x
  2. Step 2: Convert to fraction form
    155.27/214.20 = 120.26/x
  3. Step 3: Cross multiply
    155.27x = 214.20 × 120.26
  4. Step 4: Simplify right side
    155.27x = 25,758.62
  5. Step 5: Solve for x
    x = 25,758.62/155.27
  6. Step 6: Final answer
    x = 165.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.