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Finding the Fourth Proportional to 143.09, 215.03 and 110.69

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Solution

The fourth proportional to 143.09, 215.03 and 110.69 is: 166.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.09 : 215.03 = 110.69 : x
  2. Step 2: Convert to fraction form
    143.09/215.03 = 110.69/x
  3. Step 3: Cross multiply
    143.09x = 215.03 × 110.69
  4. Step 4: Simplify right side
    143.09x = 23,800.87
  5. Step 5: Solve for x
    x = 23,800.87/143.09
  6. Step 6: Final answer
    x = 166.34

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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.