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Finding the Fourth Proportional to 154.94, 213.68 and 108.29

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Solution

The fourth proportional to 154.94, 213.68 and 108.29 is: 149.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.94 : 213.68 = 108.29 : x
  2. Step 2: Convert to fraction form
    154.94/213.68 = 108.29/x
  3. Step 3: Cross multiply
    154.94x = 213.68 × 108.29
  4. Step 4: Simplify right side
    154.94x = 23,137.80
  5. Step 5: Solve for x
    x = 23,137.80/154.94
  6. Step 6: Final answer
    x = 149.34

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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.