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Finding the Fourth Proportional to 20,179,499.70, 30,348,965.70 and 18,106,879.80

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Solution

The fourth proportional to 20,179,499.70, 30,348,965.70 and 18,106,879.80 is: 27,231,848.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,179,499.70 : 30,348,965.70 = 18,106,879.80 : x
  2. Step 2: Convert to fraction form
    20,179,499.70/30,348,965.70 = 18,106,879.80/x
  3. Step 3: Cross multiply
    20,179,499.70x = 30,348,965.70 × 18,106,879.80
  4. Step 4: Simplify right side
    20,179,499.70x = 549,525,073,984,222.88
  5. Step 5: Solve for x
    x = 549,525,073,984,222.88/20,179,499.70
  6. Step 6: Final answer
    x = 27,231,848.27

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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.