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Finding the Fourth Proportional to 126,661.56, 189,843.78 and 70,475.04

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Solution

The fourth proportional to 126,661.56, 189,843.78 and 70,475.04 is: 105,629.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,661.56 : 189,843.78 = 70,475.04 : x
  2. Step 2: Convert to fraction form
    126,661.56/189,843.78 = 70,475.04/x
  3. Step 3: Cross multiply
    126,661.56x = 189,843.78 × 70,475.04
  4. Step 4: Simplify right side
    126,661.56x = 13,379,247,989.25
  5. Step 5: Solve for x
    x = 13,379,247,989.25/126,661.56
  6. Step 6: Final answer
    x = 105,629.90

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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.