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Finding the Fourth Proportional to 139,398.69, 192,369.69 and 75,735.93

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Solution

The fourth proportional to 139,398.69, 192,369.69 and 75,735.93 is: 104,515.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,398.69 : 192,369.69 = 75,735.93 : x
  2. Step 2: Convert to fraction form
    139,398.69/192,369.69 = 75,735.93/x
  3. Step 3: Cross multiply
    139,398.69x = 192,369.69 × 75,735.93
  4. Step 4: Simplify right side
    139,398.69x = 14,569,297,375.96
  5. Step 5: Solve for x
    x = 14,569,297,375.96/139,398.69
  6. Step 6: Final answer
    x = 104,515.31

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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.