Home / 128,185.28-192,300.08-57,133.20

Finding the Fourth Proportional to 128,185.28, 192,300.08 and 57,133.20

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Solution

The fourth proportional to 128,185.28, 192,300.08 and 57,133.20 is: 85,709.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,185.28 : 192,300.08 = 57,133.20 : x
  2. Step 2: Convert to fraction form
    128,185.28/192,300.08 = 57,133.20/x
  3. Step 3: Cross multiply
    128,185.28x = 192,300.08 × 57,133.20
  4. Step 4: Simplify right side
    128,185.28x = 10,986,718,930.66
  5. Step 5: Solve for x
    x = 10,986,718,930.66/128,185.28
  6. Step 6: Final answer
    x = 85,709.68

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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.