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Finding the Fourth Proportional to 149.81, 223.65 and 126.83

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Solution

The fourth proportional to 149.81, 223.65 and 126.83 is: 189.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.81 : 223.65 = 126.83 : x
  2. Step 2: Convert to fraction form
    149.81/223.65 = 126.83/x
  3. Step 3: Cross multiply
    149.81x = 223.65 × 126.83
  4. Step 4: Simplify right side
    149.81x = 28,365.53
  5. Step 5: Solve for x
    x = 28,365.53/149.81
  6. Step 6: Final answer
    x = 189.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.