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Finding the Fourth Proportional to 278,809.59, 418,192.88 and 89,289.79

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Solution

The fourth proportional to 278,809.59, 418,192.88 and 89,289.79 is: 133,927.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,809.59 : 418,192.88 = 89,289.79 : x
  2. Step 2: Convert to fraction form
    278,809.59/418,192.88 = 89,289.79/x
  3. Step 3: Cross multiply
    278,809.59x = 418,192.88 × 89,289.79
  4. Step 4: Simplify right side
    278,809.59x = 37,340,355,295.10
  5. Step 5: Solve for x
    x = 37,340,355,295.10/278,809.59
  6. Step 6: Final answer
    x = 133,927.80

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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.