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Finding the Fourth Proportional to 139,058.43, 208,593.71 and 68,040.86

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Solution

The fourth proportional to 139,058.43, 208,593.71 and 68,040.86 is: 102,064.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,058.43 : 208,593.71 = 68,040.86 : x
  2. Step 2: Convert to fraction form
    139,058.43/208,593.71 = 68,040.86/x
  3. Step 3: Cross multiply
    139,058.43x = 208,593.71 × 68,040.86
  4. Step 4: Simplify right side
    139,058.43x = 14,192,895,418.99
  5. Step 5: Solve for x
    x = 14,192,895,418.99/139,058.43
  6. Step 6: Final answer
    x = 102,064.26

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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.