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Finding the Fourth Proportional to 146.12, 201.42 and 109.28

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Solution

The fourth proportional to 146.12, 201.42 and 109.28 is: 150.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.12 : 201.42 = 109.28 : x
  2. Step 2: Convert to fraction form
    146.12/201.42 = 109.28/x
  3. Step 3: Cross multiply
    146.12x = 201.42 × 109.28
  4. Step 4: Simplify right side
    146.12x = 22,011.18
  5. Step 5: Solve for x
    x = 22,011.18/146.12
  6. Step 6: Final answer
    x = 150.64

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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.