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Finding the Fourth Proportional to 139,599,021.60, 209,398,532.40 and 127,505,786.40

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Solution

The fourth proportional to 139,599,021.60, 209,398,532.40 and 127,505,786.40 is: 191,258,679.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,599,021.60 : 209,398,532.40 = 127,505,786.40 : x
  2. Step 2: Convert to fraction form
    139,599,021.60/209,398,532.40 = 127,505,786.40/x
  3. Step 3: Cross multiply
    139,599,021.60x = 209,398,532.40 × 127,505,786.40
  4. Step 4: Simplify right side
    139,599,021.60x = 26,699,524,544,667,880
  5. Step 5: Solve for x
    x = 26,699,524,544,667,880/139,599,021.60
  6. Step 6: Final answer
    x = 191,258,679.60

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1.5x scale

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.