Home / 225,731.41-311,519.46-128,943.70

Finding the Fourth Proportional to 225,731.41, 311,519.46 and 128,943.70

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Solution

The fourth proportional to 225,731.41, 311,519.46 and 128,943.70 is: 177,948.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,731.41 : 311,519.46 = 128,943.70 : x
  2. Step 2: Convert to fraction form
    225,731.41/311,519.46 = 128,943.70/x
  3. Step 3: Cross multiply
    225,731.41x = 311,519.46 × 128,943.70
  4. Step 4: Simplify right side
    225,731.41x = 40,168,471,794.40
  5. Step 5: Solve for x
    x = 40,168,471,794.40/225,731.41
  6. Step 6: Final answer
    x = 177,948.08

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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.