Home / 278,815.14-418,238.55-79,119.72

Finding the Fourth Proportional to 278,815.14, 418,238.55 and 79,119.72

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Solution

The fourth proportional to 278,815.14, 418,238.55 and 79,119.72 is: 118,684.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,815.14 : 418,238.55 = 79,119.72 : x
  2. Step 2: Convert to fraction form
    278,815.14/418,238.55 = 79,119.72/x
  3. Step 3: Cross multiply
    278,815.14x = 418,238.55 × 79,119.72
  4. Step 4: Simplify right side
    278,815.14x = 33,090,916,969.21
  5. Step 5: Solve for x
    x = 33,090,916,969.21/278,815.14
  6. Step 6: Final answer
    x = 118,684.07

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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.