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Finding the Fourth Proportional to 278,991.15, 418,540.58 and 119,064.75

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Solution

The fourth proportional to 278,991.15, 418,540.58 and 119,064.75 is: 178,620.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,991.15 : 418,540.58 = 119,064.75 : x
  2. Step 2: Convert to fraction form
    278,991.15/418,540.58 = 119,064.75/x
  3. Step 3: Cross multiply
    278,991.15x = 418,540.58 × 119,064.75
  4. Step 4: Simplify right side
    278,991.15x = 49,833,428,473.94
  5. Step 5: Solve for x
    x = 49,833,428,473.94/278,991.15
  6. Step 6: Final answer
    x = 178,620.11

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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.