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Finding the Fourth Proportional to 155.20, 214.17 and 88.82

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Solution

The fourth proportional to 155.20, 214.17 and 88.82 is: 122.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.20 : 214.17 = 88.82 : x
  2. Step 2: Convert to fraction form
    155.20/214.17 = 88.82/x
  3. Step 3: Cross multiply
    155.20x = 214.17 × 88.82
  4. Step 4: Simplify right side
    155.20x = 19,021.06
  5. Step 5: Solve for x
    x = 19,021.06/155.20
  6. Step 6: Final answer
    x = 122.56

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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.