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Finding the Fourth Proportional to 316,912.25, 475,369.18 and 80,254.95

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Solution

The fourth proportional to 316,912.25, 475,369.18 and 80,254.95 is: 120,382.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,912.25 : 475,369.18 = 80,254.95 : x
  2. Step 2: Convert to fraction form
    316,912.25/475,369.18 = 80,254.95/x
  3. Step 3: Cross multiply
    316,912.25x = 475,369.18 × 80,254.95
  4. Step 4: Simplify right side
    316,912.25x = 38,150,729,772.44
  5. Step 5: Solve for x
    x = 38,150,729,772.44/316,912.25
  6. Step 6: Final answer
    x = 120,382.63

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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.