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Finding the Fourth Proportional to 174.44, 261.60 and 78.19

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Solution

The fourth proportional to 174.44, 261.60 and 78.19 is: 117.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.44 : 261.60 = 78.19 : x
  2. Step 2: Convert to fraction form
    174.44/261.60 = 78.19/x
  3. Step 3: Cross multiply
    174.44x = 261.60 × 78.19
  4. Step 4: Simplify right side
    174.44x = 20,453.56
  5. Step 5: Solve for x
    x = 20,453.56/174.44
  6. Step 6: Final answer
    x = 117.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.