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Finding the Fourth Proportional to 190.99, 263.56 and 103.66

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Solution

The fourth proportional to 190.99, 263.56 and 103.66 is: 143.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.99 : 263.56 = 103.66 : x
  2. Step 2: Convert to fraction form
    190.99/263.56 = 103.66/x
  3. Step 3: Cross multiply
    190.99x = 263.56 × 103.66
  4. Step 4: Simplify right side
    190.99x = 27,319.91
  5. Step 5: Solve for x
    x = 27,319.91/190.99
  6. Step 6: Final answer
    x = 143.05

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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.