Home / 128,311.05-192,499.41-53,406.30

Finding the Fourth Proportional to 128,311.05, 192,499.41 and 53,406.30

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Solution

The fourth proportional to 128,311.05, 192,499.41 and 53,406.30 is: 80,123.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,311.05 : 192,499.41 = 53,406.30 : x
  2. Step 2: Convert to fraction form
    128,311.05/192,499.41 = 53,406.30/x
  3. Step 3: Cross multiply
    128,311.05x = 192,499.41 × 53,406.30
  4. Step 4: Simplify right side
    128,311.05x = 10,280,681,240.28
  5. Step 5: Solve for x
    x = 10,280,681,240.28/128,311.05
  6. Step 6: Final answer
    x = 80,123.12

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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.