Home / 278,958.78-418,183.02-121,130.28

Finding the Fourth Proportional to 278,958.78, 418,183.02 and 121,130.28

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Solution

The fourth proportional to 278,958.78, 418,183.02 and 121,130.28 is: 181,584.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,958.78 : 418,183.02 = 121,130.28 : x
  2. Step 2: Convert to fraction form
    278,958.78/418,183.02 = 121,130.28/x
  3. Step 3: Cross multiply
    278,958.78x = 418,183.02 × 121,130.28
  4. Step 4: Simplify right side
    278,958.78x = 50,654,626,303.85
  5. Step 5: Solve for x
    x = 50,654,626,303.85/278,958.78
  6. Step 6: Final answer
    x = 181,584.63

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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.