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Finding the Fourth Proportional to 143.22, 195.16 and 139.88

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Solution

The fourth proportional to 143.22, 195.16 and 139.88 is: 190.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.22 : 195.16 = 139.88 : x
  2. Step 2: Convert to fraction form
    143.22/195.16 = 139.88/x
  3. Step 3: Cross multiply
    143.22x = 195.16 × 139.88
  4. Step 4: Simplify right side
    143.22x = 27,298.28
  5. Step 5: Solve for x
    x = 27,298.28/143.22
  6. Step 6: Final answer
    x = 190.61

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.