Home / 225,780.05-311,586-128,999.83

Finding the Fourth Proportional to 225,780.05, 311,586 and 128,999.83

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Solution

The fourth proportional to 225,780.05, 311,586 and 128,999.83 is: 178,025.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,780.05 : 311,586 = 128,999.83 : x
  2. Step 2: Convert to fraction form
    225,780.05/311,586 = 128,999.83/x
  3. Step 3: Cross multiply
    225,780.05x = 311,586 × 128,999.83
  4. Step 4: Simplify right side
    225,780.05x = 40,194,541,030.38
  5. Step 5: Solve for x
    x = 40,194,541,030.38/225,780.05
  6. Step 6: Final answer
    x = 178,025.21

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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.