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Finding the Fourth Proportional to 143.48, 213.86 and 127.98

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Solution

The fourth proportional to 143.48, 213.86 and 127.98 is: 190.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.48 : 213.86 = 127.98 : x
  2. Step 2: Convert to fraction form
    143.48/213.86 = 127.98/x
  3. Step 3: Cross multiply
    143.48x = 213.86 × 127.98
  4. Step 4: Simplify right side
    143.48x = 27,369.80
  5. Step 5: Solve for x
    x = 27,369.80/143.48
  6. Step 6: Final answer
    x = 190.76

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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.