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Finding the Fourth Proportional to 116.44, 174.31 and 79.80

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Solution

The fourth proportional to 116.44, 174.31 and 79.80 is: 119.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.44 : 174.31 = 79.80 : x
  2. Step 2: Convert to fraction form
    116.44/174.31 = 79.80/x
  3. Step 3: Cross multiply
    116.44x = 174.31 × 79.80
  4. Step 4: Simplify right side
    116.44x = 13,909.94
  5. Step 5: Solve for x
    x = 13,909.94/116.44
  6. Step 6: Final answer
    x = 119.46

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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.