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Finding the Fourth Proportional to 112.92, 155.82 and 109.04

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Solution

The fourth proportional to 112.92, 155.82 and 109.04 is: 150.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.92 : 155.82 = 109.04 : x
  2. Step 2: Convert to fraction form
    112.92/155.82 = 109.04/x
  3. Step 3: Cross multiply
    112.92x = 155.82 × 109.04
  4. Step 4: Simplify right side
    112.92x = 16,989.83
  5. Step 5: Solve for x
    x = 16,989.83/112.92
  6. Step 6: Final answer
    x = 150.46

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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.