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Finding the Fourth Proportional to 118.30, 161.95 and 114.20

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Solution

The fourth proportional to 118.30, 161.95 and 114.20 is: 156.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.30 : 161.95 = 114.20 : x
  2. Step 2: Convert to fraction form
    118.30/161.95 = 114.20/x
  3. Step 3: Cross multiply
    118.30x = 161.95 × 114.20
  4. Step 4: Simplify right side
    118.30x = 18,494.69
  5. Step 5: Solve for x
    x = 18,494.69/118.30
  6. Step 6: Final answer
    x = 156.34

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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.