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Finding the Fourth Proportional to 87,687,327.60, 123,030,997.20 and 87,687,327.60

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Solution

The fourth proportional to 87,687,327.60, 123,030,997.20 and 87,687,327.60 is: 123,030,997.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,687,327.60 : 123,030,997.20 = 87,687,327.60 : x
  2. Step 2: Convert to fraction form
    87,687,327.60/123,030,997.20 = 87,687,327.60/x
  3. Step 3: Cross multiply
    87,687,327.60x = 123,030,997.20 × 87,687,327.60
  4. Step 4: Simplify right side
    87,687,327.60x = 10,788,259,356,431,082
  5. Step 5: Solve for x
    x = 10,788,259,356,431,082/87,687,327.60
  6. Step 6: Final answer
    x = 123,030,997.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.