Home / 225,939.20-311,784.86-129,140.15

Finding the Fourth Proportional to 225,939.20, 311,784.86 and 129,140.15

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Solution

The fourth proportional to 225,939.20, 311,784.86 and 129,140.15 is: 178,206.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,939.20 : 311,784.86 = 129,140.15 : x
  2. Step 2: Convert to fraction form
    225,939.20/311,784.86 = 129,140.15/x
  3. Step 3: Cross multiply
    225,939.20x = 311,784.86 × 129,140.15
  4. Step 4: Simplify right side
    225,939.20x = 40,263,942,352.06
  5. Step 5: Solve for x
    x = 40,263,942,352.06/225,939.20
  6. Step 6: Final answer
    x = 178,206.98

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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.