Home / 128,380.55-192,580.85-42,991.73

Finding the Fourth Proportional to 128,380.55, 192,580.85 and 42,991.73

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Solution

The fourth proportional to 128,380.55, 192,580.85 and 42,991.73 is: 64,490.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,380.55 : 192,580.85 = 42,991.73 : x
  2. Step 2: Convert to fraction form
    128,380.55/192,580.85 = 42,991.73/x
  3. Step 3: Cross multiply
    128,380.55x = 192,580.85 × 42,991.73
  4. Step 4: Simplify right side
    128,380.55x = 8,279,383,424.92
  5. Step 5: Solve for x
    x = 8,279,383,424.92/128,380.55
  6. Step 6: Final answer
    x = 64,490.95

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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.