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Finding the Fourth Proportional to 165.96, 229.16 and 143.87

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Solution

The fourth proportional to 165.96, 229.16 and 143.87 is: 198.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.96 : 229.16 = 143.87 : x
  2. Step 2: Convert to fraction form
    165.96/229.16 = 143.87/x
  3. Step 3: Cross multiply
    165.96x = 229.16 × 143.87
  4. Step 4: Simplify right side
    165.96x = 32,967.38
  5. Step 5: Solve for x
    x = 32,967.38/165.96
  6. Step 6: Final answer
    x = 198.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.