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Finding the Fourth Proportional to 57.55, 78.99 and 50.62

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Solution

The fourth proportional to 57.55, 78.99 and 50.62 is: 69.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.55 : 78.99 = 50.62 : x
  2. Step 2: Convert to fraction form
    57.55/78.99 = 50.62/x
  3. Step 3: Cross multiply
    57.55x = 78.99 × 50.62
  4. Step 4: Simplify right side
    57.55x = 3,998.47
  5. Step 5: Solve for x
    x = 3,998.47/57.55
  6. Step 6: Final answer
    x = 69.48

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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.