Home / 128,203.20-192,343.64-90,835.56

Finding the Fourth Proportional to 128,203.20, 192,343.64 and 90,835.56

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Solution

The fourth proportional to 128,203.20, 192,343.64 and 90,835.56 is: 136,280.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,203.20 : 192,343.64 = 90,835.56 : x
  2. Step 2: Convert to fraction form
    128,203.20/192,343.64 = 90,835.56/x
  3. Step 3: Cross multiply
    128,203.20x = 192,343.64 × 90,835.56
  4. Step 4: Simplify right side
    128,203.20x = 17,471,641,797.66
  5. Step 5: Solve for x
    x = 17,471,641,797.66/128,203.20
  6. Step 6: Final answer
    x = 136,280.86

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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.