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Finding the Fourth Proportional to 118.98, 163.92 and 101.46

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Solution

The fourth proportional to 118.98, 163.92 and 101.46 is: 139.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.98 : 163.92 = 101.46 : x
  2. Step 2: Convert to fraction form
    118.98/163.92 = 101.46/x
  3. Step 3: Cross multiply
    118.98x = 163.92 × 101.46
  4. Step 4: Simplify right side
    118.98x = 16,631.32
  5. Step 5: Solve for x
    x = 16,631.32/118.98
  6. Step 6: Final answer
    x = 139.78

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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.