Home / 278,827.19-418,239.96-79,147.74

Finding the Fourth Proportional to 278,827.19, 418,239.96 and 79,147.74

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Solution

The fourth proportional to 278,827.19, 418,239.96 and 79,147.74 is: 118,721.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,827.19 : 418,239.96 = 79,147.74 : x
  2. Step 2: Convert to fraction form
    278,827.19/418,239.96 = 79,147.74/x
  3. Step 3: Cross multiply
    278,827.19x = 418,239.96 × 79,147.74
  4. Step 4: Simplify right side
    278,827.19x = 33,102,747,611.69
  5. Step 5: Solve for x
    x = 33,102,747,611.69/278,827.19
  6. Step 6: Final answer
    x = 118,721.38

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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.