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Finding the Fourth Proportional to 225,286.87, 310,895.06 and 121,920.85

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Solution

The fourth proportional to 225,286.87, 310,895.06 and 121,920.85 is: 168,250.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,286.87 : 310,895.06 = 121,920.85 : x
  2. Step 2: Convert to fraction form
    225,286.87/310,895.06 = 121,920.85/x
  3. Step 3: Cross multiply
    225,286.87x = 310,895.06 × 121,920.85
  4. Step 4: Simplify right side
    225,286.87x = 37,904,589,366.40
  5. Step 5: Solve for x
    x = 37,904,589,366.40/225,286.87
  6. Step 6: Final answer
    x = 168,250.33

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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.