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Finding the Fourth Proportional to 128,314.20, 192,471.30 and 75,826.20

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Solution

The fourth proportional to 128,314.20, 192,471.30 and 75,826.20 is: 113,739.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,314.20 : 192,471.30 = 75,826.20 : x
  2. Step 2: Convert to fraction form
    128,314.20/192,471.30 = 75,826.20/x
  3. Step 3: Cross multiply
    128,314.20x = 192,471.30 × 75,826.20
  4. Step 4: Simplify right side
    128,314.20x = 14,594,367,288.06
  5. Step 5: Solve for x
    x = 14,594,367,288.06/128,314.20
  6. Step 6: Final answer
    x = 113,739.30

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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.