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Finding the Fourth Proportional to 144.62, 199.56 and 129.02

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Solution

The fourth proportional to 144.62, 199.56 and 129.02 is: 178.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.62 : 199.56 = 129.02 : x
  2. Step 2: Convert to fraction form
    144.62/199.56 = 129.02/x
  3. Step 3: Cross multiply
    144.62x = 199.56 × 129.02
  4. Step 4: Simplify right side
    144.62x = 25,747.28
  5. Step 5: Solve for x
    x = 25,747.28/144.62
  6. Step 6: Final answer
    x = 178.03

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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.