Home / 381,856.05-572,785.65-129,137.85

Finding the Fourth Proportional to 381,856.05, 572,785.65 and 129,137.85

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Solution

The fourth proportional to 381,856.05, 572,785.65 and 129,137.85 is: 193,707.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,856.05 : 572,785.65 = 129,137.85 : x
  2. Step 2: Convert to fraction form
    381,856.05/572,785.65 = 129,137.85/x
  3. Step 3: Cross multiply
    381,856.05x = 572,785.65 × 129,137.85
  4. Step 4: Simplify right side
    381,856.05x = 73,968,307,351.85
  5. Step 5: Solve for x
    x = 73,968,307,351.85/381,856.05
  6. Step 6: Final answer
    x = 193,707.31

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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.