Home / 278,921.42-418,333.73-79,195.13

Finding the Fourth Proportional to 278,921.42, 418,333.73 and 79,195.13

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Solution

The fourth proportional to 278,921.42, 418,333.73 and 79,195.13 is: 118,778.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,921.42 : 418,333.73 = 79,195.13 : x
  2. Step 2: Convert to fraction form
    278,921.42/418,333.73 = 79,195.13/x
  3. Step 3: Cross multiply
    278,921.42x = 418,333.73 × 79,195.13
  4. Step 4: Simplify right side
    278,921.42x = 33,129,991,643.09
  5. Step 5: Solve for x
    x = 33,129,991,643.09/278,921.42
  6. Step 6: Final answer
    x = 118,778.95

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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.