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Finding the Fourth Proportional to 189,391.87, 261,394.59 and 112,915.92

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Solution

The fourth proportional to 189,391.87, 261,394.59 and 112,915.92 is: 155,844.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,391.87 : 261,394.59 = 112,915.92 : x
  2. Step 2: Convert to fraction form
    189,391.87/261,394.59 = 112,915.92/x
  3. Step 3: Cross multiply
    189,391.87x = 261,394.59 × 112,915.92
  4. Step 4: Simplify right side
    189,391.87x = 29,515,612,016.54
  5. Step 5: Solve for x
    x = 29,515,612,016.54/189,391.87
  6. Step 6: Final answer
    x = 155,844.13

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1.5x scale

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.