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Finding the Fourth Proportional to 65,791,836.80, 98,697,086.40 and 20,348,892.80

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Solution

The fourth proportional to 65,791,836.80, 98,697,086.40 and 20,348,892.80 is: 30,526,225.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,791,836.80 : 98,697,086.40 = 20,348,892.80 : x
  2. Step 2: Convert to fraction form
    65,791,836.80/98,697,086.40 = 20,348,892.80/x
  3. Step 3: Cross multiply
    65,791,836.80x = 98,697,086.40 × 20,348,892.80
  4. Step 4: Simplify right side
    65,791,836.80x = 2,008,376,430,825,938
  5. Step 5: Solve for x
    x = 2,008,376,430,825,938/65,791,836.80
  6. Step 6: Final answer
    x = 30,526,225.27

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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.