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Finding the Fourth Proportional to 54.77, 82.11 and 45.19

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Solution

The fourth proportional to 54.77, 82.11 and 45.19 is: 67.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.77 : 82.11 = 45.19 : x
  2. Step 2: Convert to fraction form
    54.77/82.11 = 45.19/x
  3. Step 3: Cross multiply
    54.77x = 82.11 × 45.19
  4. Step 4: Simplify right side
    54.77x = 3,710.82
  5. Step 5: Solve for x
    x = 3,710.82/54.77
  6. Step 6: Final answer
    x = 67.76

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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.