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Finding the Fourth Proportional to 126,392.92, 174,431.42 and 72,694.78

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Solution

The fourth proportional to 126,392.92, 174,431.42 and 72,694.78 is: 100,324.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,392.92 : 174,431.42 = 72,694.78 : x
  2. Step 2: Convert to fraction form
    126,392.92/174,431.42 = 72,694.78/x
  3. Step 3: Cross multiply
    126,392.92x = 174,431.42 × 72,694.78
  4. Step 4: Simplify right side
    126,392.92x = 12,680,253,701.99
  5. Step 5: Solve for x
    x = 12,680,253,701.99/126,392.92
  6. Step 6: Final answer
    x = 100,324.08

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1.5x scale

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.