Home / 128,719.44-177,589.98-83,456.73

Finding the Fourth Proportional to 128,719.44, 177,589.98 and 83,456.73

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Solution

The fourth proportional to 128,719.44, 177,589.98 and 83,456.73 is: 115,142.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,719.44 : 177,589.98 = 83,456.73 : x
  2. Step 2: Convert to fraction form
    128,719.44/177,589.98 = 83,456.73/x
  3. Step 3: Cross multiply
    128,719.44x = 177,589.98 × 83,456.73
  4. Step 4: Simplify right side
    128,719.44x = 14,821,079,011.57
  5. Step 5: Solve for x
    x = 14,821,079,011.57/128,719.44
  6. Step 6: Final answer
    x = 115,142.51

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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.