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Finding the Fourth Proportional to 146.57, 202.28 and 81.08

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Solution

The fourth proportional to 146.57, 202.28 and 81.08 is: 111.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.57 : 202.28 = 81.08 : x
  2. Step 2: Convert to fraction form
    146.57/202.28 = 81.08/x
  3. Step 3: Cross multiply
    146.57x = 202.28 × 81.08
  4. Step 4: Simplify right side
    146.57x = 16,400.86
  5. Step 5: Solve for x
    x = 16,400.86/146.57
  6. Step 6: Final answer
    x = 111.90

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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.