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Finding the Fourth Proportional to 109.76, 163.89 and 94.37

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Solution

The fourth proportional to 109.76, 163.89 and 94.37 is: 140.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.76 : 163.89 = 94.37 : x
  2. Step 2: Convert to fraction form
    109.76/163.89 = 94.37/x
  3. Step 3: Cross multiply
    109.76x = 163.89 × 94.37
  4. Step 4: Simplify right side
    109.76x = 15,465.48
  5. Step 5: Solve for x
    x = 15,465.48/109.76
  6. Step 6: Final answer
    x = 140.91

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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.