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Finding the Fourth Proportional to 89.93, 134.84 and 38.55

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Solution

The fourth proportional to 89.93, 134.84 and 38.55 is: 57.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.93 : 134.84 = 38.55 : x
  2. Step 2: Convert to fraction form
    89.93/134.84 = 38.55/x
  3. Step 3: Cross multiply
    89.93x = 134.84 × 38.55
  4. Step 4: Simplify right side
    89.93x = 5,197.22
  5. Step 5: Solve for x
    x = 5,197.22/89.93
  6. Step 6: Final answer
    x = 57.79

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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.