Home / 311,579.39-467,447.81-86,939.67

Finding the Fourth Proportional to 311,579.39, 467,447.81 and 86,939.67

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Solution

The fourth proportional to 311,579.39, 467,447.81 and 86,939.67 is: 130,431.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,579.39 : 467,447.81 = 86,939.67 : x
  2. Step 2: Convert to fraction form
    311,579.39/467,447.81 = 86,939.67/x
  3. Step 3: Cross multiply
    311,579.39x = 467,447.81 × 86,939.67
  4. Step 4: Simplify right side
    311,579.39x = 40,639,757,908.92
  5. Step 5: Solve for x
    x = 40,639,757,908.92/311,579.39
  6. Step 6: Final answer
    x = 130,431.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.