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Finding the Fourth Proportional to 118.60, 163.59 and 89.44

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Solution

The fourth proportional to 118.60, 163.59 and 89.44 is: 123.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.60 : 163.59 = 89.44 : x
  2. Step 2: Convert to fraction form
    118.60/163.59 = 89.44/x
  3. Step 3: Cross multiply
    118.60x = 163.59 × 89.44
  4. Step 4: Simplify right side
    118.60x = 14,630.75
  5. Step 5: Solve for x
    x = 14,630.75/118.60
  6. Step 6: Final answer
    x = 123.36

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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.