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Finding the Fourth Proportional to 126,640.50, 189,960.93 and 43,534.50

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Solution

The fourth proportional to 126,640.50, 189,960.93 and 43,534.50 is: 65,301.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,640.50 : 189,960.93 = 43,534.50 : x
  2. Step 2: Convert to fraction form
    126,640.50/189,960.93 = 43,534.50/x
  3. Step 3: Cross multiply
    126,640.50x = 189,960.93 × 43,534.50
  4. Step 4: Simplify right side
    126,640.50x = 8,269,854,107.09
  5. Step 5: Solve for x
    x = 8,269,854,107.09/126,640.50
  6. Step 6: Final answer
    x = 65,301.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.