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Finding the Fourth Proportional to 65,791,831.80, 98,697,078.90 and 20,348,887.80

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Solution

The fourth proportional to 65,791,831.80, 98,697,078.90 and 20,348,887.80 is: 30,526,217.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,791,831.80 : 98,697,078.90 = 20,348,887.80 : x
  2. Step 2: Convert to fraction form
    65,791,831.80/98,697,078.90 = 20,348,887.80/x
  3. Step 3: Cross multiply
    65,791,831.80x = 98,697,078.90 × 20,348,887.80
  4. Step 4: Simplify right side
    65,791,831.80x = 2,008,375,784,723,847.50
  5. Step 5: Solve for x
    x = 2,008,375,784,723,847.50/65,791,831.80
  6. Step 6: Final answer
    x = 30,526,217.77

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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.