Home / 278,828.51-418,241.92-79,149.06

Finding the Fourth Proportional to 278,828.51, 418,241.92 and 79,149.06

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Solution

The fourth proportional to 278,828.51, 418,241.92 and 79,149.06 is: 118,723.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,828.51 : 418,241.92 = 79,149.06 : x
  2. Step 2: Convert to fraction form
    278,828.51/418,241.92 = 79,149.06/x
  3. Step 3: Cross multiply
    278,828.51x = 418,241.92 × 79,149.06
  4. Step 4: Simplify right side
    278,828.51x = 33,103,454,820.60
  5. Step 5: Solve for x
    x = 33,103,454,820.60/278,828.51
  6. Step 6: Final answer
    x = 118,723.35

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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.