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Finding the Fourth Proportional to 55.66, 76.85 and 36

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Solution

The fourth proportional to 55.66, 76.85 and 36 is: 49.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.66 : 76.85 = 36 : x
  2. Step 2: Convert to fraction form
    55.66/76.85 = 36/x
  3. Step 3: Cross multiply
    55.66x = 76.85 × 36
  4. Step 4: Simplify right side
    55.66x = 2,766.60
  5. Step 5: Solve for x
    x = 2,766.60/55.66
  6. Step 6: Final answer
    x = 49.71

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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.