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Finding the Fourth Proportional to 28,192,997.80, 42,289,496.70 and 19,583,653.60

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Solution

The fourth proportional to 28,192,997.80, 42,289,496.70 and 19,583,653.60 is: 29,375,480.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,192,997.80 : 42,289,496.70 = 19,583,653.60 : x
  2. Step 2: Convert to fraction form
    28,192,997.80/42,289,496.70 = 19,583,653.60/x
  3. Step 3: Cross multiply
    28,192,997.80x = 42,289,496.70 × 19,583,653.60
  4. Step 4: Simplify right side
    28,192,997.80x = 828,182,854,291,143.25
  5. Step 5: Solve for x
    x = 828,182,854,291,143.25/28,192,997.80
  6. Step 6: Final answer
    x = 29,375,480.40

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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.