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Finding the Fourth Proportional to 68,879.39, 103,306.95 and 18,947.43

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Solution

The fourth proportional to 68,879.39, 103,306.95 and 18,947.43 is: 28,417.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,879.39 : 103,306.95 = 18,947.43 : x
  2. Step 2: Convert to fraction form
    68,879.39/103,306.95 = 18,947.43/x
  3. Step 3: Cross multiply
    68,879.39x = 103,306.95 × 18,947.43
  4. Step 4: Simplify right side
    68,879.39x = 1,957,401,203.64
  5. Step 5: Solve for x
    x = 1,957,401,203.64/68,879.39
  6. Step 6: Final answer
    x = 28,417.81

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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.