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Finding the Fourth Proportional to 57.92, 79.85 and 48.09

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Solution

The fourth proportional to 57.92, 79.85 and 48.09 is: 66.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.92 : 79.85 = 48.09 : x
  2. Step 2: Convert to fraction form
    57.92/79.85 = 48.09/x
  3. Step 3: Cross multiply
    57.92x = 79.85 × 48.09
  4. Step 4: Simplify right side
    57.92x = 3,839.69
  5. Step 5: Solve for x
    x = 3,839.69/57.92
  6. Step 6: Final answer
    x = 66.30

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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.