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Finding the Fourth Proportional to 225,908.87, 338,661.95 and 85,765.91

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Solution

The fourth proportional to 225,908.87, 338,661.95 and 85,765.91 is: 128,572.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,908.87 : 338,661.95 = 85,765.91 : x
  2. Step 2: Convert to fraction form
    225,908.87/338,661.95 = 85,765.91/x
  3. Step 3: Cross multiply
    225,908.87x = 338,661.95 × 85,765.91
  4. Step 4: Simplify right side
    225,908.87x = 29,045,648,201.99
  5. Step 5: Solve for x
    x = 29,045,648,201.99/225,908.87
  6. Step 6: Final answer
    x = 128,572.41

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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.