Home / 278,938.38-418,403.91-68,578.14

Finding the Fourth Proportional to 278,938.38, 418,403.91 and 68,578.14

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Solution

The fourth proportional to 278,938.38, 418,403.91 and 68,578.14 is: 102,866.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,938.38 : 418,403.91 = 68,578.14 : x
  2. Step 2: Convert to fraction form
    278,938.38/418,403.91 = 68,578.14/x
  3. Step 3: Cross multiply
    278,938.38x = 418,403.91 × 68,578.14
  4. Step 4: Simplify right side
    278,938.38x = 28,693,361,916.53
  5. Step 5: Solve for x
    x = 28,693,361,916.53/278,938.38
  6. Step 6: Final answer
    x = 102,866.31

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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.