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Finding the Fourth Proportional to 146.28, 201.90 and 120.36

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Solution

The fourth proportional to 146.28, 201.90 and 120.36 is: 166.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.28 : 201.90 = 120.36 : x
  2. Step 2: Convert to fraction form
    146.28/201.90 = 120.36/x
  3. Step 3: Cross multiply
    146.28x = 201.90 × 120.36
  4. Step 4: Simplify right side
    146.28x = 24,300.68
  5. Step 5: Solve for x
    x = 24,300.68/146.28
  6. Step 6: Final answer
    x = 166.12

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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.