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Finding the Fourth Proportional to 190.66, 263.09 and 107.76

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Solution

The fourth proportional to 190.66, 263.09 and 107.76 is: 148.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.66 : 263.09 = 107.76 : x
  2. Step 2: Convert to fraction form
    190.66/263.09 = 107.76/x
  3. Step 3: Cross multiply
    190.66x = 263.09 × 107.76
  4. Step 4: Simplify right side
    190.66x = 28,350.58
  5. Step 5: Solve for x
    x = 28,350.58/190.66
  6. Step 6: Final answer
    x = 148.70

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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.