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Finding the Fourth Proportional to 143.74, 214.61 and 126.33

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Solution

The fourth proportional to 143.74, 214.61 and 126.33 is: 188.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.74 : 214.61 = 126.33 : x
  2. Step 2: Convert to fraction form
    143.74/214.61 = 126.33/x
  3. Step 3: Cross multiply
    143.74x = 214.61 × 126.33
  4. Step 4: Simplify right side
    143.74x = 27,110.24
  5. Step 5: Solve for x
    x = 27,110.24/143.74
  6. Step 6: Final answer
    x = 188.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.