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Finding the Fourth Proportional to 76,764,199.20, 114,978,337.20 and 66,686,503.20

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Solution

The fourth proportional to 76,764,199.20, 114,978,337.20 and 66,686,503.20 is: 99,883,843.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,764,199.20 : 114,978,337.20 = 66,686,503.20 : x
  2. Step 2: Convert to fraction form
    76,764,199.20/114,978,337.20 = 66,686,503.20/x
  3. Step 3: Cross multiply
    76,764,199.20x = 114,978,337.20 × 66,686,503.20
  4. Step 4: Simplify right side
    76,764,199.20x = 7,667,503,251,618,480
  5. Step 5: Solve for x
    x = 7,667,503,251,618,480/76,764,199.20
  6. Step 6: Final answer
    x = 99,883,843.40

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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.