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Finding the Fourth Proportional to 144.51, 199.39 and 85.51

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Solution

The fourth proportional to 144.51, 199.39 and 85.51 is: 117.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.51 : 199.39 = 85.51 : x
  2. Step 2: Convert to fraction form
    144.51/199.39 = 85.51/x
  3. Step 3: Cross multiply
    144.51x = 199.39 × 85.51
  4. Step 4: Simplify right side
    144.51x = 17,049.84
  5. Step 5: Solve for x
    x = 17,049.84/144.51
  6. Step 6: Final answer
    x = 117.98

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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.