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Finding the Fourth Proportional to 189,857.70, 284,786.55 and 118,998.90

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Solution

The fourth proportional to 189,857.70, 284,786.55 and 118,998.90 is: 178,498.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,857.70 : 284,786.55 = 118,998.90 : x
  2. Step 2: Convert to fraction form
    189,857.70/284,786.55 = 118,998.90/x
  3. Step 3: Cross multiply
    189,857.70x = 284,786.55 × 118,998.90
  4. Step 4: Simplify right side
    189,857.70x = 33,889,286,184.80
  5. Step 5: Solve for x
    x = 33,889,286,184.80/189,857.70
  6. Step 6: Final answer
    x = 178,498.35

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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.