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Finding the Fourth Proportional to 189,668.45, 261,734.72 and 103,630.42

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Solution

The fourth proportional to 189,668.45, 261,734.72 and 103,630.42 is: 143,005.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,668.45 : 261,734.72 = 103,630.42 : x
  2. Step 2: Convert to fraction form
    189,668.45/261,734.72 = 103,630.42/x
  3. Step 3: Cross multiply
    189,668.45x = 261,734.72 × 103,630.42
  4. Step 4: Simplify right side
    189,668.45x = 27,123,677,135.36
  5. Step 5: Solve for x
    x = 27,123,677,135.36/189,668.45
  6. Step 6: Final answer
    x = 143,005.74

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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.