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Finding the Fourth Proportional to 118.68, 163.69 and 113.32

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Solution

The fourth proportional to 118.68, 163.69 and 113.32 is: 156.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.68 : 163.69 = 113.32 : x
  2. Step 2: Convert to fraction form
    118.68/163.69 = 113.32/x
  3. Step 3: Cross multiply
    118.68x = 163.69 × 113.32
  4. Step 4: Simplify right side
    118.68x = 18,549.35
  5. Step 5: Solve for x
    x = 18,549.35/118.68
  6. Step 6: Final answer
    x = 156.30

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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.