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Finding the Fourth Proportional to 84,612.92, 126,785.85 and 31,231.41

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Solution

The fourth proportional to 84,612.92, 126,785.85 and 31,231.41 is: 46,797.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,612.92 : 126,785.85 = 31,231.41 : x
  2. Step 2: Convert to fraction form
    84,612.92/126,785.85 = 31,231.41/x
  3. Step 3: Cross multiply
    84,612.92x = 126,785.85 × 31,231.41
  4. Step 4: Simplify right side
    84,612.92x = 3,959,700,863.55
  5. Step 5: Solve for x
    x = 3,959,700,863.55/84,612.92
  6. Step 6: Final answer
    x = 46,797.83

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1.5x scale

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.