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Finding the Fourth Proportional to 144.15, 198.91 and 124.51

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Solution

The fourth proportional to 144.15, 198.91 and 124.51 is: 171.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.15 : 198.91 = 124.51 : x
  2. Step 2: Convert to fraction form
    144.15/198.91 = 124.51/x
  3. Step 3: Cross multiply
    144.15x = 198.91 × 124.51
  4. Step 4: Simplify right side
    144.15x = 24,766.28
  5. Step 5: Solve for x
    x = 24,766.28/144.15
  6. Step 6: Final answer
    x = 171.81

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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.