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Finding the Fourth Proportional to 36.99, 50.90 and 31.77

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Solution

The fourth proportional to 36.99, 50.90 and 31.77 is: 43.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    36.99 : 50.90 = 31.77 : x
  2. Step 2: Convert to fraction form
    36.99/50.90 = 31.77/x
  3. Step 3: Cross multiply
    36.99x = 50.90 × 31.77
  4. Step 4: Simplify right side
    36.99x = 1,616.93
  5. Step 5: Solve for x
    x = 1,616.93/36.99
  6. Step 6: Final answer
    x = 43.71

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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.