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Finding the Fourth Proportional to 20,179,921.80, 28,188,117.60 and 20,179,921.80

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Solution

The fourth proportional to 20,179,921.80, 28,188,117.60 and 20,179,921.80 is: 28,188,117.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,179,921.80 : 28,188,117.60 = 20,179,921.80 : x
  2. Step 2: Convert to fraction form
    20,179,921.80/28,188,117.60 = 20,179,921.80/x
  3. Step 3: Cross multiply
    20,179,921.80x = 28,188,117.60 × 20,179,921.80
  4. Step 4: Simplify right side
    20,179,921.80x = 568,834,008,857,203.75
  5. Step 5: Solve for x
    x = 568,834,008,857,203.75/20,179,921.80
  6. Step 6: Final answer
    x = 28,188,117.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.