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Finding the Fourth Proportional to 155.89, 234.01 and 90.97

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Solution

The fourth proportional to 155.89, 234.01 and 90.97 is: 136.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.89 : 234.01 = 90.97 : x
  2. Step 2: Convert to fraction form
    155.89/234.01 = 90.97/x
  3. Step 3: Cross multiply
    155.89x = 234.01 × 90.97
  4. Step 4: Simplify right side
    155.89x = 21,287.42
  5. Step 5: Solve for x
    x = 21,287.42/155.89
  6. Step 6: Final answer
    x = 136.55

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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.