Home / 205,217.10-307,856.43-72,073.89

Finding the Fourth Proportional to 205,217.10, 307,856.43 and 72,073.89

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Solution

The fourth proportional to 205,217.10, 307,856.43 and 72,073.89 is: 108,121.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,217.10 : 307,856.43 = 72,073.89 : x
  2. Step 2: Convert to fraction form
    205,217.10/307,856.43 = 72,073.89/x
  3. Step 3: Cross multiply
    205,217.10x = 307,856.43 × 72,073.89
  4. Step 4: Simplify right side
    205,217.10x = 22,188,410,471.61
  5. Step 5: Solve for x
    x = 22,188,410,471.61/205,217.10
  6. Step 6: Final answer
    x = 108,121.65

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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.