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Finding the Fourth Proportional to 68,879.34, 103,058.16 and 40,814.46

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Solution

The fourth proportional to 68,879.34, 103,058.16 and 40,814.46 is: 61,067.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,879.34 : 103,058.16 = 40,814.46 : x
  2. Step 2: Convert to fraction form
    68,879.34/103,058.16 = 40,814.46/x
  3. Step 3: Cross multiply
    68,879.34x = 103,058.16 × 40,814.46
  4. Step 4: Simplify right side
    68,879.34x = 4,206,263,148.99
  5. Step 5: Solve for x
    x = 4,206,263,148.99/68,879.34
  6. Step 6: Final answer
    x = 61,067.12

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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.