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Finding the Fourth Proportional to 198,139, 273,431.79 and 113,257.89

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Solution

The fourth proportional to 198,139, 273,431.79 and 113,257.89 is: 156,295.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,139 : 273,431.79 = 113,257.89 : x
  2. Step 2: Convert to fraction form
    198,139/273,431.79 = 113,257.89/x
  3. Step 3: Cross multiply
    198,139x = 273,431.79 × 113,257.89
  4. Step 4: Simplify right side
    198,139x = 30,968,307,594.32
  5. Step 5: Solve for x
    x = 30,968,307,594.32/198,139
  6. Step 6: Final answer
    x = 156,295.87

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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.