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Finding the Fourth Proportional to 215,252.62, 322,865.86 and 80,290.66

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Solution

The fourth proportional to 215,252.62, 322,865.86 and 80,290.66 is: 120,431.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,252.62 : 322,865.86 = 80,290.66 : x
  2. Step 2: Convert to fraction form
    215,252.62/322,865.86 = 80,290.66/x
  3. Step 3: Cross multiply
    215,252.62x = 322,865.86 × 80,290.66
  4. Step 4: Simplify right side
    215,252.62x = 25,923,112,990.87
  5. Step 5: Solve for x
    x = 25,923,112,990.87/215,252.62
  6. Step 6: Final answer
    x = 120,431.11

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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.