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Finding the Fourth Proportional to 111,787.92, 154,338.12 and 69,391.44

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Solution

The fourth proportional to 111,787.92, 154,338.12 and 69,391.44 is: 95,804.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,787.92 : 154,338.12 = 69,391.44 : x
  2. Step 2: Convert to fraction form
    111,787.92/154,338.12 = 69,391.44/x
  3. Step 3: Cross multiply
    111,787.92x = 154,338.12 × 69,391.44
  4. Step 4: Simplify right side
    111,787.92x = 10,709,744,393.69
  5. Step 5: Solve for x
    x = 10,709,744,393.69/111,787.92
  6. Step 6: Final answer
    x = 95,804.13

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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.