Home / 225,517.04-311,205.38-128,725.89

Finding the Fourth Proportional to 225,517.04, 311,205.38 and 128,725.89

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Solution

The fourth proportional to 225,517.04, 311,205.38 and 128,725.89 is: 177,637.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,517.04 : 311,205.38 = 128,725.89 : x
  2. Step 2: Convert to fraction form
    225,517.04/311,205.38 = 128,725.89/x
  3. Step 3: Cross multiply
    225,517.04x = 311,205.38 × 128,725.89
  4. Step 4: Simplify right side
    225,517.04x = 40,060,188,869.66
  5. Step 5: Solve for x
    x = 40,060,188,869.66/225,517.04
  6. Step 6: Final answer
    x = 177,637.09

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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.