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Finding the Fourth Proportional to 139,518.11, 192,542.87 and 75,854.54

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Solution

The fourth proportional to 139,518.11, 192,542.87 and 75,854.54 is: 104,683.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,518.11 : 192,542.87 = 75,854.54 : x
  2. Step 2: Convert to fraction form
    139,518.11/192,542.87 = 75,854.54/x
  3. Step 3: Cross multiply
    139,518.11x = 192,542.87 × 75,854.54
  4. Step 4: Simplify right side
    139,518.11x = 14,605,250,454.86
  5. Step 5: Solve for x
    x = 14,605,250,454.86/139,518.11
  6. Step 6: Final answer
    x = 104,683.55

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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.