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Finding the Fourth Proportional to 19,128,218.60, 28,692,327.90 and 19,128,218.60

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Solution

The fourth proportional to 19,128,218.60, 28,692,327.90 and 19,128,218.60 is: 28,692,327.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,128,218.60 : 28,692,327.90 = 19,128,218.60 : x
  2. Step 2: Convert to fraction form
    19,128,218.60/28,692,327.90 = 19,128,218.60/x
  3. Step 3: Cross multiply
    19,128,218.60x = 28,692,327.90 × 19,128,218.60
  4. Step 4: Simplify right side
    19,128,218.60x = 548,833,120,214,078.94
  5. Step 5: Solve for x
    x = 548,833,120,214,078.94/19,128,218.60
  6. Step 6: Final answer
    x = 28,692,327.90

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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.