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Finding the Fourth Proportional to 146.91, 202.74 and 91.68

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Solution

The fourth proportional to 146.91, 202.74 and 91.68 is: 126.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.91 : 202.74 = 91.68 : x
  2. Step 2: Convert to fraction form
    146.91/202.74 = 91.68/x
  3. Step 3: Cross multiply
    146.91x = 202.74 × 91.68
  4. Step 4: Simplify right side
    146.91x = 18,587.20
  5. Step 5: Solve for x
    x = 18,587.20/146.91
  6. Step 6: Final answer
    x = 126.52

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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.