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Finding the Fourth Proportional to 278,750.84, 418,131.84 and 89,247.38

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Solution

The fourth proportional to 278,750.84, 418,131.84 and 89,247.38 is: 133,872.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,750.84 : 418,131.84 = 89,247.38 : x
  2. Step 2: Convert to fraction form
    278,750.84/418,131.84 = 89,247.38/x
  3. Step 3: Cross multiply
    278,750.84x = 418,131.84 × 89,247.38
  4. Step 4: Simplify right side
    278,750.84x = 37,317,171,214.58
  5. Step 5: Solve for x
    x = 37,317,171,214.58/278,750.84
  6. Step 6: Final answer
    x = 133,872.86

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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.