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Finding the Fourth Proportional to 112.30, 167.69 and 100.76

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Solution

The fourth proportional to 112.30, 167.69 and 100.76 is: 150.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.30 : 167.69 = 100.76 : x
  2. Step 2: Convert to fraction form
    112.30/167.69 = 100.76/x
  3. Step 3: Cross multiply
    112.30x = 167.69 × 100.76
  4. Step 4: Simplify right side
    112.30x = 16,896.44
  5. Step 5: Solve for x
    x = 16,896.44/112.30
  6. Step 6: Final answer
    x = 150.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.