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Finding the Fourth Proportional to 129,698.60, 194,403.90 and 50,786.60

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Solution

The fourth proportional to 129,698.60, 194,403.90 and 50,786.60 is: 76,123.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,698.60 : 194,403.90 = 50,786.60 : x
  2. Step 2: Convert to fraction form
    129,698.60/194,403.90 = 50,786.60/x
  3. Step 3: Cross multiply
    129,698.60x = 194,403.90 × 50,786.60
  4. Step 4: Simplify right side
    129,698.60x = 9,873,113,107.74
  5. Step 5: Solve for x
    x = 9,873,113,107.74/129,698.60
  6. Step 6: Final answer
    x = 76,123.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.