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Finding the Fourth Proportional to 120.11, 179.94 and 100.98

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Solution

The fourth proportional to 120.11, 179.94 and 100.98 is: 151.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.11 : 179.94 = 100.98 : x
  2. Step 2: Convert to fraction form
    120.11/179.94 = 100.98/x
  3. Step 3: Cross multiply
    120.11x = 179.94 × 100.98
  4. Step 4: Simplify right side
    120.11x = 18,170.34
  5. Step 5: Solve for x
    x = 18,170.34/120.11
  6. Step 6: Final answer
    x = 151.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.