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Finding the Fourth Proportional to 166.87, 230.20 and 145

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Solution

The fourth proportional to 166.87, 230.20 and 145 is: 200.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.87 : 230.20 = 145 : x
  2. Step 2: Convert to fraction form
    166.87/230.20 = 145/x
  3. Step 3: Cross multiply
    166.87x = 230.20 × 145
  4. Step 4: Simplify right side
    166.87x = 33,379
  5. Step 5: Solve for x
    x = 33,379/166.87
  6. Step 6: Final answer
    x = 200.03

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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.