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Finding the Fourth Proportional to 154.96, 213.70 and 119.93

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Solution

The fourth proportional to 154.96, 213.70 and 119.93 is: 165.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.96 : 213.70 = 119.93 : x
  2. Step 2: Convert to fraction form
    154.96/213.70 = 119.93/x
  3. Step 3: Cross multiply
    154.96x = 213.70 × 119.93
  4. Step 4: Simplify right side
    154.96x = 25,629.04
  5. Step 5: Solve for x
    x = 25,629.04/154.96
  6. Step 6: Final answer
    x = 165.39

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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.