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Finding the Fourth Proportional to 20,772,644.60, 31,158,966.90 and 20,772,644.60

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Solution

The fourth proportional to 20,772,644.60, 31,158,966.90 and 20,772,644.60 is: 31,158,966.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772,644.60 : 31,158,966.90 = 20,772,644.60 : x
  2. Step 2: Convert to fraction form
    20,772,644.60/31,158,966.90 = 20,772,644.60/x
  3. Step 3: Cross multiply
    20,772,644.60x = 31,158,966.90 × 20,772,644.60
  4. Step 4: Simplify right side
    20,772,644.60x = 647,254,145,516,863.75
  5. Step 5: Solve for x
    x = 647,254,145,516,863.75/20,772,644.60
  6. Step 6: Final answer
    x = 31,158,966.90

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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.