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Finding the Fourth Proportional to 139,403.91, 192,378.24 and 75,741.87

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Solution

The fourth proportional to 139,403.91, 192,378.24 and 75,741.87 is: 104,524.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,403.91 : 192,378.24 = 75,741.87 : x
  2. Step 2: Convert to fraction form
    139,403.91/192,378.24 = 75,741.87/x
  3. Step 3: Cross multiply
    139,403.91x = 192,378.24 × 75,741.87
  4. Step 4: Simplify right side
    139,403.91x = 14,571,087,644.91
  5. Step 5: Solve for x
    x = 14,571,087,644.91/139,403.91
  6. Step 6: Final answer
    x = 104,524.24

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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.