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Finding the Fourth Proportional to 143.24, 215.65 and 126.22

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Solution

The fourth proportional to 143.24, 215.65 and 126.22 is: 190.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.24 : 215.65 = 126.22 : x
  2. Step 2: Convert to fraction form
    143.24/215.65 = 126.22/x
  3. Step 3: Cross multiply
    143.24x = 215.65 × 126.22
  4. Step 4: Simplify right side
    143.24x = 27,219.34
  5. Step 5: Solve for x
    x = 27,219.34/143.24
  6. Step 6: Final answer
    x = 190.03

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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.