Home / 128,898.41-177,901.17-75,183.42

Finding the Fourth Proportional to 128,898.41, 177,901.17 and 75,183.42

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Solution

The fourth proportional to 128,898.41, 177,901.17 and 75,183.42 is: 103,765.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,898.41 : 177,901.17 = 75,183.42 : x
  2. Step 2: Convert to fraction form
    128,898.41/177,901.17 = 75,183.42/x
  3. Step 3: Cross multiply
    128,898.41x = 177,901.17 × 75,183.42
  4. Step 4: Simplify right side
    128,898.41x = 13,375,218,382.60
  5. Step 5: Solve for x
    x = 13,375,218,382.60/128,898.41
  6. Step 6: Final answer
    x = 103,765.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.