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Finding the Fourth Proportional to 118.93, 164.12 and 66.47

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Solution

The fourth proportional to 118.93, 164.12 and 66.47 is: 91.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.93 : 164.12 = 66.47 : x
  2. Step 2: Convert to fraction form
    118.93/164.12 = 66.47/x
  3. Step 3: Cross multiply
    118.93x = 164.12 × 66.47
  4. Step 4: Simplify right side
    118.93x = 10,909.13
  5. Step 5: Solve for x
    x = 10,909.13/118.93
  6. Step 6: Final answer
    x = 91.73

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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.