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Finding the Fourth Proportional to 166.42, 230.07 and 145.90

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Solution

The fourth proportional to 166.42, 230.07 and 145.90 is: 201.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.42 : 230.07 = 145.90 : x
  2. Step 2: Convert to fraction form
    166.42/230.07 = 145.90/x
  3. Step 3: Cross multiply
    166.42x = 230.07 × 145.90
  4. Step 4: Simplify right side
    166.42x = 33,567.21
  5. Step 5: Solve for x
    x = 33,567.21/166.42
  6. Step 6: Final answer
    x = 201.70

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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.