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Finding the Fourth Proportional to 143.10, 214.11 and 108.81

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Solution

The fourth proportional to 143.10, 214.11 and 108.81 is: 162.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.10 : 214.11 = 108.81 : x
  2. Step 2: Convert to fraction form
    143.10/214.11 = 108.81/x
  3. Step 3: Cross multiply
    143.10x = 214.11 × 108.81
  4. Step 4: Simplify right side
    143.10x = 23,297.31
  5. Step 5: Solve for x
    x = 23,297.31/143.10
  6. Step 6: Final answer
    x = 162.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.