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Finding the Fourth Proportional to 139,571.29, 192,609.29 and 75,909.55

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Solution

The fourth proportional to 139,571.29, 192,609.29 and 75,909.55 is: 104,755.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,571.29 : 192,609.29 = 75,909.55 : x
  2. Step 2: Convert to fraction form
    139,571.29/192,609.29 = 75,909.55/x
  3. Step 3: Cross multiply
    139,571.29x = 192,609.29 × 75,909.55
  4. Step 4: Simplify right side
    139,571.29x = 14,620,884,529.72
  5. Step 5: Solve for x
    x = 14,620,884,529.72/139,571.29
  6. Step 6: Final answer
    x = 104,755.67

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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.