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Finding the Fourth Proportional to 139,242.28, 192,149.19 and 75,578.71

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Solution

The fourth proportional to 139,242.28, 192,149.19 and 75,578.71 is: 104,295.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,242.28 : 192,149.19 = 75,578.71 : x
  2. Step 2: Convert to fraction form
    139,242.28/192,149.19 = 75,578.71/x
  3. Step 3: Cross multiply
    139,242.28x = 192,149.19 × 75,578.71
  4. Step 4: Simplify right side
    139,242.28x = 14,522,387,907.74
  5. Step 5: Solve for x
    x = 14,522,387,907.74/139,242.28
  6. Step 6: Final answer
    x = 104,295.82

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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.