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Finding the Fourth Proportional to 114.44, 171.40 and 84.20

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Solution

The fourth proportional to 114.44, 171.40 and 84.20 is: 126.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.44 : 171.40 = 84.20 : x
  2. Step 2: Convert to fraction form
    114.44/171.40 = 84.20/x
  3. Step 3: Cross multiply
    114.44x = 171.40 × 84.20
  4. Step 4: Simplify right side
    114.44x = 14,431.88
  5. Step 5: Solve for x
    x = 14,431.88/114.44
  6. Step 6: Final answer
    x = 126.11

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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.