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Finding the Fourth Proportional to 201,872.07, 278,583.72 and 109,990.92

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Solution

The fourth proportional to 201,872.07, 278,583.72 and 109,990.92 is: 151,787.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,872.07 : 278,583.72 = 109,990.92 : x
  2. Step 2: Convert to fraction form
    201,872.07/278,583.72 = 109,990.92/x
  3. Step 3: Cross multiply
    201,872.07x = 278,583.72 × 109,990.92
  4. Step 4: Simplify right side
    201,872.07x = 30,641,679,659.82
  5. Step 5: Solve for x
    x = 30,641,679,659.82/201,872.07
  6. Step 6: Final answer
    x = 151,787.61

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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.