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Finding the Fourth Proportional to 139,405.86, 192,375.81 and 75,742.29

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Solution

The fourth proportional to 139,405.86, 192,375.81 and 75,742.29 is: 104,522.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,405.86 : 192,375.81 = 75,742.29 : x
  2. Step 2: Convert to fraction form
    139,405.86/192,375.81 = 75,742.29/x
  3. Step 3: Cross multiply
    139,405.86x = 192,375.81 × 75,742.29
  4. Step 4: Simplify right side
    139,405.86x = 14,570,984,390.00
  5. Step 5: Solve for x
    x = 14,570,984,390.00/139,405.86
  6. Step 6: Final answer
    x = 104,522.04

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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.