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Finding the Fourth Proportional to 190.82, 263.37 and 120.93

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Solution

The fourth proportional to 190.82, 263.37 and 120.93 is: 166.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.82 : 263.37 = 120.93 : x
  2. Step 2: Convert to fraction form
    190.82/263.37 = 120.93/x
  3. Step 3: Cross multiply
    190.82x = 263.37 × 120.93
  4. Step 4: Simplify right side
    190.82x = 31,850.34
  5. Step 5: Solve for x
    x = 31,850.34/190.82
  6. Step 6: Final answer
    x = 166.91

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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.