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Finding the Fourth Proportional to 147.11, 202.98 and 91.85

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Solution

The fourth proportional to 147.11, 202.98 and 91.85 is: 126.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.11 : 202.98 = 91.85 : x
  2. Step 2: Convert to fraction form
    147.11/202.98 = 91.85/x
  3. Step 3: Cross multiply
    147.11x = 202.98 × 91.85
  4. Step 4: Simplify right side
    147.11x = 18,644.56
  5. Step 5: Solve for x
    x = 18,644.56/147.11
  6. Step 6: Final answer
    x = 126.74

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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.