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Finding the Fourth Proportional to 189,714.75, 261,803.19 and 103,671.85

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Solution

The fourth proportional to 189,714.75, 261,803.19 and 103,671.85 is: 143,065.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,714.75 : 261,803.19 = 103,671.85 : x
  2. Step 2: Convert to fraction form
    189,714.75/261,803.19 = 103,671.85/x
  3. Step 3: Cross multiply
    189,714.75x = 261,803.19 × 103,671.85
  4. Step 4: Simplify right side
    189,714.75x = 27,141,621,043.20
  5. Step 5: Solve for x
    x = 27,141,621,043.20/189,714.75
  6. Step 6: Final answer
    x = 143,065.42

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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.