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Finding the Fourth Proportional to 126,366.01, 189,600.57 and 81,410.86

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Solution

The fourth proportional to 126,366.01, 189,600.57 and 81,410.86 is: 122,149.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,366.01 : 189,600.57 = 81,410.86 : x
  2. Step 2: Convert to fraction form
    126,366.01/189,600.57 = 81,410.86/x
  3. Step 3: Cross multiply
    126,366.01x = 189,600.57 × 81,410.86
  4. Step 4: Simplify right side
    126,366.01x = 15,435,544,986.19
  5. Step 5: Solve for x
    x = 15,435,544,986.19/126,366.01
  6. Step 6: Final answer
    x = 122,149.50

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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.