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Finding the Fourth Proportional to 139,453.89, 192,447.62 and 75,791.76

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Solution

The fourth proportional to 139,453.89, 192,447.62 and 75,791.76 is: 104,593.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,453.89 : 192,447.62 = 75,791.76 : x
  2. Step 2: Convert to fraction form
    139,453.89/192,447.62 = 75,791.76/x
  3. Step 3: Cross multiply
    139,453.89x = 192,447.62 × 75,791.76
  4. Step 4: Simplify right side
    139,453.89x = 14,585,943,827.61
  5. Step 5: Solve for x
    x = 14,585,943,827.61/139,453.89
  6. Step 6: Final answer
    x = 104,593.31

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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.