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Finding the Fourth Proportional to 111,942.95, 154,481.24 and 61,641.95

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Solution

The fourth proportional to 111,942.95, 154,481.24 and 61,641.95 is: 85,065.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,942.95 : 154,481.24 = 61,641.95 : x
  2. Step 2: Convert to fraction form
    111,942.95/154,481.24 = 61,641.95/x
  3. Step 3: Cross multiply
    111,942.95x = 154,481.24 × 61,641.95
  4. Step 4: Simplify right side
    111,942.95x = 9,522,524,253.72
  5. Step 5: Solve for x
    x = 9,522,524,253.72/111,942.95
  6. Step 6: Final answer
    x = 85,065.87

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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.