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Finding the Fourth Proportional to 118.29, 161.80 and 117.89

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Solution

The fourth proportional to 118.29, 161.80 and 117.89 is: 161.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.29 : 161.80 = 117.89 : x
  2. Step 2: Convert to fraction form
    118.29/161.80 = 117.89/x
  3. Step 3: Cross multiply
    118.29x = 161.80 × 117.89
  4. Step 4: Simplify right side
    118.29x = 19,074.11
  5. Step 5: Solve for x
    x = 19,074.11/118.29
  6. Step 6: Final answer
    x = 161.24

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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.