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Finding the Fourth Proportional to 174.21, 240.36 and 108.71

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Solution

The fourth proportional to 174.21, 240.36 and 108.71 is: 149.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.21 : 240.36 = 108.71 : x
  2. Step 2: Convert to fraction form
    174.21/240.36 = 108.71/x
  3. Step 3: Cross multiply
    174.21x = 240.36 × 108.71
  4. Step 4: Simplify right side
    174.21x = 26,129.59
  5. Step 5: Solve for x
    x = 26,129.59/174.21
  6. Step 6: Final answer
    x = 149.99

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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.