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Finding the Fourth Proportional to 36.68, 50.52 and 31.18

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Solution

The fourth proportional to 36.68, 50.52 and 31.18 is: 42.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    36.68 : 50.52 = 31.18 : x
  2. Step 2: Convert to fraction form
    36.68/50.52 = 31.18/x
  3. Step 3: Cross multiply
    36.68x = 50.52 × 31.18
  4. Step 4: Simplify right side
    36.68x = 1,575.21
  5. Step 5: Solve for x
    x = 1,575.21/36.68
  6. Step 6: Final answer
    x = 42.94

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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.