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Finding the Fourth Proportional to 55.21, 76.22 and 35.81

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Solution

The fourth proportional to 55.21, 76.22 and 35.81 is: 49.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.21 : 76.22 = 35.81 : x
  2. Step 2: Convert to fraction form
    55.21/76.22 = 35.81/x
  3. Step 3: Cross multiply
    55.21x = 76.22 × 35.81
  4. Step 4: Simplify right side
    55.21x = 2,729.72
  5. Step 5: Solve for x
    x = 2,729.72/55.21
  6. Step 6: Final answer
    x = 49.44

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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.