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Finding the Fourth Proportional to 55.62, 77.06 and 54.74

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Solution

The fourth proportional to 55.62, 77.06 and 54.74 is: 75.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.62 : 77.06 = 54.74 : x
  2. Step 2: Convert to fraction form
    55.62/77.06 = 54.74/x
  3. Step 3: Cross multiply
    55.62x = 77.06 × 54.74
  4. Step 4: Simplify right side
    55.62x = 4,218.59
  5. Step 5: Solve for x
    x = 4,218.59/55.62
  6. Step 6: Final answer
    x = 75.85

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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.