Home / 128,245.41-192,318.84-53,400.87

Finding the Fourth Proportional to 128,245.41, 192,318.84 and 53,400.87

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Solution

The fourth proportional to 128,245.41, 192,318.84 and 53,400.87 is: 80,080.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,245.41 : 192,318.84 = 53,400.87 : x
  2. Step 2: Convert to fraction form
    128,245.41/192,318.84 = 53,400.87/x
  3. Step 3: Cross multiply
    128,245.41x = 192,318.84 × 53,400.87
  4. Step 4: Simplify right side
    128,245.41x = 10,269,993,373.39
  5. Step 5: Solve for x
    x = 10,269,993,373.39/128,245.41
  6. Step 6: Final answer
    x = 80,080.79

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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.