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Finding the Fourth Proportional to 57.91, 80.01 and 57.34

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Solution

The fourth proportional to 57.91, 80.01 and 57.34 is: 79.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.91 : 80.01 = 57.34 : x
  2. Step 2: Convert to fraction form
    57.91/80.01 = 57.34/x
  3. Step 3: Cross multiply
    57.91x = 80.01 × 57.34
  4. Step 4: Simplify right side
    57.91x = 4,587.77
  5. Step 5: Solve for x
    x = 4,587.77/57.91
  6. Step 6: Final answer
    x = 79.22

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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.