Home / 278,805.24-418,145.22-79,121.34

Finding the Fourth Proportional to 278,805.24, 418,145.22 and 79,121.34

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Solution

The fourth proportional to 278,805.24, 418,145.22 and 79,121.34 is: 118,664.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,805.24 : 418,145.22 = 79,121.34 : x
  2. Step 2: Convert to fraction form
    278,805.24/418,145.22 = 79,121.34/x
  3. Step 3: Cross multiply
    278,805.24x = 418,145.22 × 79,121.34
  4. Step 4: Simplify right side
    278,805.24x = 33,084,210,120.99
  5. Step 5: Solve for x
    x = 33,084,210,120.99/278,805.24
  6. Step 6: Final answer
    x = 118,664.23

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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.