Home / 278,707.05-417,997.53-128,865.69

Finding the Fourth Proportional to 278,707.05, 417,997.53 and 128,865.69

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Solution

The fourth proportional to 278,707.05, 417,997.53 and 128,865.69 is: 193,269.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,707.05 : 417,997.53 = 128,865.69 : x
  2. Step 2: Convert to fraction form
    278,707.05/417,997.53 = 128,865.69/x
  3. Step 3: Cross multiply
    278,707.05x = 417,997.53 × 128,865.69
  4. Step 4: Simplify right side
    278,707.05x = 53,865,540,121.75
  5. Step 5: Solve for x
    x = 53,865,540,121.75/278,707.05
  6. Step 6: Final answer
    x = 193,269.38

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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.