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Finding the Fourth Proportional to 112.12, 154.41 and 98.35

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Solution

The fourth proportional to 112.12, 154.41 and 98.35 is: 135.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.12 : 154.41 = 98.35 : x
  2. Step 2: Convert to fraction form
    112.12/154.41 = 98.35/x
  3. Step 3: Cross multiply
    112.12x = 154.41 × 98.35
  4. Step 4: Simplify right side
    112.12x = 15,185.47
  5. Step 5: Solve for x
    x = 15,185.47/112.12
  6. Step 6: Final answer
    x = 135.44

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.