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Finding the Fourth Proportional to 20,764,447.80, 31,146,671.70 and 20,764,447.80

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Solution

The fourth proportional to 20,764,447.80, 31,146,671.70 and 20,764,447.80 is: 31,146,671.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764,447.80 : 31,146,671.70 = 20,764,447.80 : x
  2. Step 2: Convert to fraction form
    20,764,447.80/31,146,671.70 = 20,764,447.80/x
  3. Step 3: Cross multiply
    20,764,447.80x = 31,146,671.70 × 20,764,447.80
  4. Step 4: Simplify right side
    20,764,447.80x = 646,743,438,658,387.25
  5. Step 5: Solve for x
    x = 646,743,438,658,387.25/20,764,447.80
  6. Step 6: Final answer
    x = 31,146,671.70

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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.