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Finding the Fourth Proportional to 264,231.90, 396,348.12 and 123,990.66

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Solution

The fourth proportional to 264,231.90, 396,348.12 and 123,990.66 is: 185,986.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    264,231.90 : 396,348.12 = 123,990.66 : x
  2. Step 2: Convert to fraction form
    264,231.90/396,348.12 = 123,990.66/x
  3. Step 3: Cross multiply
    264,231.90x = 396,348.12 × 123,990.66
  4. Step 4: Simplify right side
    264,231.90x = 49,143,464,988.56
  5. Step 5: Solve for x
    x = 49,143,464,988.56/264,231.90
  6. Step 6: Final answer
    x = 185,986.12

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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.