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Finding the Fourth Proportional to 279,149.94, 418,724.91 and 68,787.90

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Solution

The fourth proportional to 279,149.94, 418,724.91 and 68,787.90 is: 103,181.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,149.94 : 418,724.91 = 68,787.90 : x
  2. Step 2: Convert to fraction form
    279,149.94/418,724.91 = 68,787.90/x
  3. Step 3: Cross multiply
    279,149.94x = 418,724.91 × 68,787.90
  4. Step 4: Simplify right side
    279,149.94x = 28,803,207,236.59
  5. Step 5: Solve for x
    x = 28,803,207,236.59/279,149.94
  6. Step 6: Final answer
    x = 103,181.85

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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.