Home / 278,899.20-418,304.76-121,085.28

Finding the Fourth Proportional to 278,899.20, 418,304.76 and 121,085.28

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Solution

The fourth proportional to 278,899.20, 418,304.76 and 121,085.28 is: 181,608.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,899.20 : 418,304.76 = 121,085.28 : x
  2. Step 2: Convert to fraction form
    278,899.20/418,304.76 = 121,085.28/x
  3. Step 3: Cross multiply
    278,899.20x = 418,304.76 × 121,085.28
  4. Step 4: Simplify right side
    278,899.20x = 50,650,548,989.93
  5. Step 5: Solve for x
    x = 50,650,548,989.93/278,899.20
  6. Step 6: Final answer
    x = 181,608.80

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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.