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Finding the Fourth Proportional to 112.19, 155.12 and 98.34

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Solution

The fourth proportional to 112.19, 155.12 and 98.34 is: 135.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.19 : 155.12 = 98.34 : x
  2. Step 2: Convert to fraction form
    112.19/155.12 = 98.34/x
  3. Step 3: Cross multiply
    112.19x = 155.12 × 98.34
  4. Step 4: Simplify right side
    112.19x = 15,253.86
  5. Step 5: Solve for x
    x = 15,253.86/112.19
  6. Step 6: Final answer
    x = 135.97

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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.