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Finding the Fourth Proportional to 55,990,969.20, 83,986,453.80 and 55,990,969.20

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Solution

The fourth proportional to 55,990,969.20, 83,986,453.80 and 55,990,969.20 is: 83,986,453.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,990,969.20 : 83,986,453.80 = 55,990,969.20 : x
  2. Step 2: Convert to fraction form
    55,990,969.20/83,986,453.80 = 55,990,969.20/x
  3. Step 3: Cross multiply
    55,990,969.20x = 83,986,453.80 × 55,990,969.20
  4. Step 4: Simplify right side
    55,990,969.20x = 4,702,482,947,933,023
  5. Step 5: Solve for x
    x = 4,702,482,947,933,023/55,990,969.20
  6. Step 6: Final answer
    x = 83,986,453.80

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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.