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Finding the Fourth Proportional to 57.99, 79.65 and 48.75

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Solution

The fourth proportional to 57.99, 79.65 and 48.75 is: 66.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.99 : 79.65 = 48.75 : x
  2. Step 2: Convert to fraction form
    57.99/79.65 = 48.75/x
  3. Step 3: Cross multiply
    57.99x = 79.65 × 48.75
  4. Step 4: Simplify right side
    57.99x = 3,882.94
  5. Step 5: Solve for x
    x = 3,882.94/57.99
  6. Step 6: Final answer
    x = 66.96

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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.