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Finding the Fourth Proportional to 143.91, 214.92 and 125.69

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Solution

The fourth proportional to 143.91, 214.92 and 125.69 is: 187.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.91 : 214.92 = 125.69 : x
  2. Step 2: Convert to fraction form
    143.91/214.92 = 125.69/x
  3. Step 3: Cross multiply
    143.91x = 214.92 × 125.69
  4. Step 4: Simplify right side
    143.91x = 27,012.22
  5. Step 5: Solve for x
    x = 27,012.22/143.91
  6. Step 6: Final answer
    x = 187.70

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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.