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Finding the Fourth Proportional to 112.05, 167.95 and 43.55

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Solution

The fourth proportional to 112.05, 167.95 and 43.55 is: 65.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.05 : 167.95 = 43.55 : x
  2. Step 2: Convert to fraction form
    112.05/167.95 = 43.55/x
  3. Step 3: Cross multiply
    112.05x = 167.95 × 43.55
  4. Step 4: Simplify right side
    112.05x = 7,314.22
  5. Step 5: Solve for x
    x = 7,314.22/112.05
  6. Step 6: Final answer
    x = 65.28

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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.