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Finding the Fourth Proportional to 118.19, 162.11 and 116.21

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Solution

The fourth proportional to 118.19, 162.11 and 116.21 is: 159.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.19 : 162.11 = 116.21 : x
  2. Step 2: Convert to fraction form
    118.19/162.11 = 116.21/x
  3. Step 3: Cross multiply
    118.19x = 162.11 × 116.21
  4. Step 4: Simplify right side
    118.19x = 18,837.41
  5. Step 5: Solve for x
    x = 18,837.41/118.19
  6. Step 6: Final answer
    x = 159.39

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.