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Finding the Fourth Proportional to 118.60, 163.62 and 79.24

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Solution

The fourth proportional to 118.60, 163.62 and 79.24 is: 109.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.60 : 163.62 = 79.24 : x
  2. Step 2: Convert to fraction form
    118.60/163.62 = 79.24/x
  3. Step 3: Cross multiply
    118.60x = 163.62 × 79.24
  4. Step 4: Simplify right side
    118.60x = 12,965.25
  5. Step 5: Solve for x
    x = 12,965.25/118.60
  6. Step 6: Final answer
    x = 109.32

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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.