Home / 225,623.80-311,321.36-128,783.44

Finding the Fourth Proportional to 225,623.80, 311,321.36 and 128,783.44

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Solution

The fourth proportional to 225,623.80, 311,321.36 and 128,783.44 is: 177,698.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,623.80 : 311,321.36 = 128,783.44 : x
  2. Step 2: Convert to fraction form
    225,623.80/311,321.36 = 128,783.44/x
  3. Step 3: Cross multiply
    225,623.80x = 311,321.36 × 128,783.44
  4. Step 4: Simplify right side
    225,623.80x = 40,093,035,686.28
  5. Step 5: Solve for x
    x = 40,093,035,686.28/225,623.80
  6. Step 6: Final answer
    x = 177,698.61

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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.