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Finding the Fourth Proportional to 269,390.35, 404,140.20 and 91,915.30

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Solution

The fourth proportional to 269,390.35, 404,140.20 and 91,915.30 is: 137,891.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,390.35 : 404,140.20 = 91,915.30 : x
  2. Step 2: Convert to fraction form
    269,390.35/404,140.20 = 91,915.30/x
  3. Step 3: Cross multiply
    269,390.35x = 404,140.20 × 91,915.30
  4. Step 4: Simplify right side
    269,390.35x = 37,146,667,725.06
  5. Step 5: Solve for x
    x = 37,146,667,725.06/269,390.35
  6. Step 6: Final answer
    x = 137,891.60

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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.