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Finding the Fourth Proportional to 144.47, 199.36 and 86.25

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Solution

The fourth proportional to 144.47, 199.36 and 86.25 is: 119.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.47 : 199.36 = 86.25 : x
  2. Step 2: Convert to fraction form
    144.47/199.36 = 86.25/x
  3. Step 3: Cross multiply
    144.47x = 199.36 × 86.25
  4. Step 4: Simplify right side
    144.47x = 17,194.80
  5. Step 5: Solve for x
    x = 17,194.80/144.47
  6. Step 6: Final answer
    x = 119.02

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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.