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Finding the Fourth Proportional to 118.84, 164.15 and 107.30

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Solution

The fourth proportional to 118.84, 164.15 and 107.30 is: 148.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.84 : 164.15 = 107.30 : x
  2. Step 2: Convert to fraction form
    118.84/164.15 = 107.30/x
  3. Step 3: Cross multiply
    118.84x = 164.15 × 107.30
  4. Step 4: Simplify right side
    118.84x = 17,613.30
  5. Step 5: Solve for x
    x = 17,613.30/118.84
  6. Step 6: Final answer
    x = 148.21

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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.