Home / 278,813.11-418,217.82-79,133.62

Finding the Fourth Proportional to 278,813.11, 418,217.82 and 79,133.62

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Solution

The fourth proportional to 278,813.11, 418,217.82 and 79,133.62 is: 118,699.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,813.11 : 418,217.82 = 79,133.62 : x
  2. Step 2: Convert to fraction form
    278,813.11/418,217.82 = 79,133.62/x
  3. Step 3: Cross multiply
    278,813.11x = 418,217.82 × 79,133.62
  4. Step 4: Simplify right side
    278,813.11x = 33,095,090,045.11
  5. Step 5: Solve for x
    x = 33,095,090,045.11/278,813.11
  6. Step 6: Final answer
    x = 118,699.91

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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.