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Finding the Fourth Proportional to 143.24, 216 and 126.29

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Solution

The fourth proportional to 143.24, 216 and 126.29 is: 190.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.24 : 216 = 126.29 : x
  2. Step 2: Convert to fraction form
    143.24/216 = 126.29/x
  3. Step 3: Cross multiply
    143.24x = 216 × 126.29
  4. Step 4: Simplify right side
    143.24x = 27,279.18
  5. Step 5: Solve for x
    x = 27,279.18/143.24
  6. Step 6: Final answer
    x = 190.45

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.