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Finding the Fourth Proportional to 144.99, 200.07 and 121.59

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Solution

The fourth proportional to 144.99, 200.07 and 121.59 is: 167.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.99 : 200.07 = 121.59 : x
  2. Step 2: Convert to fraction form
    144.99/200.07 = 121.59/x
  3. Step 3: Cross multiply
    144.99x = 200.07 × 121.59
  4. Step 4: Simplify right side
    144.99x = 24,326.51
  5. Step 5: Solve for x
    x = 24,326.51/144.99
  6. Step 6: Final answer
    x = 167.78

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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.