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Finding the Fourth Proportional to 155.27, 214.03 and 122.47

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Solution

The fourth proportional to 155.27, 214.03 and 122.47 is: 168.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.27 : 214.03 = 122.47 : x
  2. Step 2: Convert to fraction form
    155.27/214.03 = 122.47/x
  3. Step 3: Cross multiply
    155.27x = 214.03 × 122.47
  4. Step 4: Simplify right side
    155.27x = 26,212.25
  5. Step 5: Solve for x
    x = 26,212.25/155.27
  6. Step 6: Final answer
    x = 168.82

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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.