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Finding the Fourth Proportional to 66,119,811.40, 99,193,713.90 and 20,057,897.80

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Solution

The fourth proportional to 66,119,811.40, 99,193,713.90 and 20,057,897.80 is: 30,091,092.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,119,811.40 : 99,193,713.90 = 20,057,897.80 : x
  2. Step 2: Convert to fraction form
    66,119,811.40/99,193,713.90 = 20,057,897.80/x
  3. Step 3: Cross multiply
    66,119,811.40x = 99,193,713.90 × 20,057,897.80
  4. Step 4: Simplify right side
    66,119,811.40x = 1,989,617,375,808,639.50
  5. Step 5: Solve for x
    x = 1,989,617,375,808,639.50/66,119,811.40
  6. Step 6: Final answer
    x = 30,091,092.73

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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.