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Finding the Fourth Proportional to 57.01, 78.09 and 55.27

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Solution

The fourth proportional to 57.01, 78.09 and 55.27 is: 75.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.01 : 78.09 = 55.27 : x
  2. Step 2: Convert to fraction form
    57.01/78.09 = 55.27/x
  3. Step 3: Cross multiply
    57.01x = 78.09 × 55.27
  4. Step 4: Simplify right side
    57.01x = 4,316.03
  5. Step 5: Solve for x
    x = 4,316.03/57.01
  6. Step 6: Final answer
    x = 75.71

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.