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Finding the Fourth Proportional to 155.34, 214.44 and 122.52

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Solution

The fourth proportional to 155.34, 214.44 and 122.52 is: 169.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.34 : 214.44 = 122.52 : x
  2. Step 2: Convert to fraction form
    155.34/214.44 = 122.52/x
  3. Step 3: Cross multiply
    155.34x = 214.44 × 122.52
  4. Step 4: Simplify right side
    155.34x = 26,273.19
  5. Step 5: Solve for x
    x = 26,273.19/155.34
  6. Step 6: Final answer
    x = 169.13

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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.