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Finding the Fourth Proportional to 139,403.85, 192,377.57 and 75,741.72

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Solution

The fourth proportional to 139,403.85, 192,377.57 and 75,741.72 is: 104,523.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,403.85 : 192,377.57 = 75,741.72 : x
  2. Step 2: Convert to fraction form
    139,403.85/192,377.57 = 75,741.72/x
  3. Step 3: Cross multiply
    139,403.85x = 192,377.57 × 75,741.72
  4. Step 4: Simplify right side
    139,403.85x = 14,571,007,662.51
  5. Step 5: Solve for x
    x = 14,571,007,662.51/139,403.85
  6. Step 6: Final answer
    x = 104,523.71

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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.