Home / 278,819.81-418,228.89-79,140.38

Finding the Fourth Proportional to 278,819.81, 418,228.89 and 79,140.38

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Solution

The fourth proportional to 278,819.81, 418,228.89 and 79,140.38 is: 118,710.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,819.81 : 418,228.89 = 79,140.38 : x
  2. Step 2: Convert to fraction form
    278,819.81/418,228.89 = 79,140.38/x
  3. Step 3: Cross multiply
    278,819.81x = 418,228.89 × 79,140.38
  4. Step 4: Simplify right side
    278,819.81x = 33,098,791,190.43
  5. Step 5: Solve for x
    x = 33,098,791,190.43/278,819.81
  6. Step 6: Final answer
    x = 118,710.33

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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.