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Finding the Fourth Proportional to 139,571.54, 192,609.64 and 75,909.80

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Solution

The fourth proportional to 139,571.54, 192,609.64 and 75,909.80 is: 104,756.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,571.54 : 192,609.64 = 75,909.80 : x
  2. Step 2: Convert to fraction form
    139,571.54/192,609.64 = 75,909.80/x
  3. Step 3: Cross multiply
    139,571.54x = 192,609.64 × 75,909.80
  4. Step 4: Simplify right side
    139,571.54x = 14,620,958,870.92
  5. Step 5: Solve for x
    x = 14,620,958,870.92/139,571.54
  6. Step 6: Final answer
    x = 104,756.02

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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.