Home / 278,840.45-418,262.07-68,478.41

Finding the Fourth Proportional to 278,840.45, 418,262.07 and 68,478.41

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Solution

The fourth proportional to 278,840.45, 418,262.07 and 68,478.41 is: 102,717.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,840.45 : 418,262.07 = 68,478.41 : x
  2. Step 2: Convert to fraction form
    278,840.45/418,262.07 = 68,478.41/x
  3. Step 3: Cross multiply
    278,840.45x = 418,262.07 × 68,478.41
  4. Step 4: Simplify right side
    278,840.45x = 28,641,921,516.91
  5. Step 5: Solve for x
    x = 28,641,921,516.91/278,840.45
  6. Step 6: Final answer
    x = 102,717.96

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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.