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Finding the Fourth Proportional to 139,605.43, 192,656.97 and 75,943.39

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Solution

The fourth proportional to 139,605.43, 192,656.97 and 75,943.39 is: 104,802.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,605.43 : 192,656.97 = 75,943.39 : x
  2. Step 2: Convert to fraction form
    139,605.43/192,656.97 = 75,943.39/x
  3. Step 3: Cross multiply
    139,605.43x = 192,656.97 × 75,943.39
  4. Step 4: Simplify right side
    139,605.43x = 14,631,023,408.93
  5. Step 5: Solve for x
    x = 14,631,023,408.93/139,605.43
  6. Step 6: Final answer
    x = 104,802.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.