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Finding the Fourth Proportional to 278,435.43, 417,661.35 and 68,073.39

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Solution

The fourth proportional to 278,435.43, 417,661.35 and 68,073.39 is: 102,112.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,435.43 : 417,661.35 = 68,073.39 : x
  2. Step 2: Convert to fraction form
    278,435.43/417,661.35 = 68,073.39/x
  3. Step 3: Cross multiply
    278,435.43x = 417,661.35 × 68,073.39
  4. Step 4: Simplify right side
    278,435.43x = 28,431,623,966.48
  5. Step 5: Solve for x
    x = 28,431,623,966.48/278,435.43
  6. Step 6: Final answer
    x = 102,112.09

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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.