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Finding the Fourth Proportional to 55.66, 77.15 and 54.79

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Solution

The fourth proportional to 55.66, 77.15 and 54.79 is: 75.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.66 : 77.15 = 54.79 : x
  2. Step 2: Convert to fraction form
    55.66/77.15 = 54.79/x
  3. Step 3: Cross multiply
    55.66x = 77.15 × 54.79
  4. Step 4: Simplify right side
    55.66x = 4,227.05
  5. Step 5: Solve for x
    x = 4,227.05/55.66
  6. Step 6: Final answer
    x = 75.94

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.