Home / 278,837.37-417,913.43-128,874.78

Finding the Fourth Proportional to 278,837.37, 417,913.43 and 128,874.78

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Solution

The fourth proportional to 278,837.37, 417,913.43 and 128,874.78 is: 193,153.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,837.37 : 417,913.43 = 128,874.78 : x
  2. Step 2: Convert to fraction form
    278,837.37/417,913.43 = 128,874.78/x
  3. Step 3: Cross multiply
    278,837.37x = 417,913.43 × 128,874.78
  4. Step 4: Simplify right side
    278,837.37x = 53,858,500,705.92
  5. Step 5: Solve for x
    x = 53,858,500,705.92/278,837.37
  6. Step 6: Final answer
    x = 193,153.81

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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.