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Finding the Fourth Proportional to 6,615,196,978.67, 9,915,729,784.66 and 3,772,871,805.85

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Solution

The fourth proportional to 6,615,196,978.67, 9,915,729,784.66 and 3,772,871,805.85 is: 5,655,277,909.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,615,196,978.67 : 9,915,729,784.66 = 3,772,871,805.85 : x
  2. Step 2: Convert to fraction form
    6,615,196,978.67/9,915,729,784.66 = 3,772,871,805.85/x
  3. Step 3: Cross multiply
    6,615,196,978.67x = 9,915,729,784.66 × 3,772,871,805.85
  4. Step 4: Simplify right side
    6,615,196,978.67x = 37,410,777,338,970,808,320
  5. Step 5: Solve for x
    x = 37,410,777,338,970,808,320/6,615,196,978.67
  6. Step 6: Final answer
    x = 5,655,277,909.27

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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.