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Finding the Fourth Proportional to 139,620.44, 192,743.13 and 85,951.46

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Solution

The fourth proportional to 139,620.44, 192,743.13 and 85,951.46 is: 118,654.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,620.44 : 192,743.13 = 85,951.46 : x
  2. Step 2: Convert to fraction form
    139,620.44/192,743.13 = 85,951.46/x
  3. Step 3: Cross multiply
    139,620.44x = 192,743.13 × 85,951.46
  4. Step 4: Simplify right side
    139,620.44x = 16,566,554,125.21
  5. Step 5: Solve for x
    x = 16,566,554,125.21/139,620.44
  6. Step 6: Final answer
    x = 118,654.22

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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.