Home / 128,288.88-192,399.60-38,310.24

Finding the Fourth Proportional to 128,288.88, 192,399.60 and 38,310.24

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Solution

The fourth proportional to 128,288.88, 192,399.60 and 38,310.24 is: 57,455.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,288.88 : 192,399.60 = 38,310.24 : x
  2. Step 2: Convert to fraction form
    128,288.88/192,399.60 = 38,310.24/x
  3. Step 3: Cross multiply
    128,288.88x = 192,399.60 × 38,310.24
  4. Step 4: Simplify right side
    128,288.88x = 7,370,874,851.90
  5. Step 5: Solve for x
    x = 7,370,874,851.90/128,288.88
  6. Step 6: Final answer
    x = 57,455.29

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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.