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Finding the Fourth Proportional to 66,379.12, 99,584.64 and 18,994.96

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Solution

The fourth proportional to 66,379.12, 99,584.64 and 18,994.96 is: 28,497.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,379.12 : 99,584.64 = 18,994.96 : x
  2. Step 2: Convert to fraction form
    66,379.12/99,584.64 = 18,994.96/x
  3. Step 3: Cross multiply
    66,379.12x = 99,584.64 × 18,994.96
  4. Step 4: Simplify right side
    66,379.12x = 1,891,606,253.41
  5. Step 5: Solve for x
    x = 1,891,606,253.41/66,379.12
  6. Step 6: Final answer
    x = 28,497.01

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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.