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Finding the Fourth Proportional to 205,379.43, 308,104.18 and 91,568.54

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Solution

The fourth proportional to 205,379.43, 308,104.18 and 91,568.54 is: 137,368.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,379.43 : 308,104.18 = 91,568.54 : x
  2. Step 2: Convert to fraction form
    205,379.43/308,104.18 = 91,568.54/x
  3. Step 3: Cross multiply
    205,379.43x = 308,104.18 × 91,568.54
  4. Step 4: Simplify right side
    205,379.43x = 28,212,648,389.98
  5. Step 5: Solve for x
    x = 28,212,648,389.98/205,379.43
  6. Step 6: Final answer
    x = 137,368.42

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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.