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Finding the Fourth Proportional to 139,202.68, 192,103.40 and 75,540.52

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Solution

The fourth proportional to 139,202.68, 192,103.40 and 75,540.52 is: 104,247.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,202.68 : 192,103.40 = 75,540.52 : x
  2. Step 2: Convert to fraction form
    139,202.68/192,103.40 = 75,540.52/x
  3. Step 3: Cross multiply
    139,202.68x = 192,103.40 × 75,540.52
  4. Step 4: Simplify right side
    139,202.68x = 14,511,590,729.77
  5. Step 5: Solve for x
    x = 14,511,590,729.77/139,202.68
  6. Step 6: Final answer
    x = 104,247.93

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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.