Home / 128,251.20-192,158.10-105,943.80

Finding the Fourth Proportional to 128,251.20, 192,158.10 and 105,943.80

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Solution

The fourth proportional to 128,251.20, 192,158.10 and 105,943.80 is: 158,735.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,251.20 : 192,158.10 = 105,943.80 : x
  2. Step 2: Convert to fraction form
    128,251.20/192,158.10 = 105,943.80/x
  3. Step 3: Cross multiply
    128,251.20x = 192,158.10 × 105,943.80
  4. Step 4: Simplify right side
    128,251.20x = 20,357,959,314.78
  5. Step 5: Solve for x
    x = 20,357,959,314.78/128,251.20
  6. Step 6: Final answer
    x = 158,735.04

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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.