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Finding the Fourth Proportional to 65,216,485.80, 91,437,449.40 and 65,216,485.80

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Solution

The fourth proportional to 65,216,485.80, 91,437,449.40 and 65,216,485.80 is: 91,437,449.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,216,485.80 : 91,437,449.40 = 65,216,485.80 : x
  2. Step 2: Convert to fraction form
    65,216,485.80/91,437,449.40 = 65,216,485.80/x
  3. Step 3: Cross multiply
    65,216,485.80x = 91,437,449.40 × 65,216,485.80
  4. Step 4: Simplify right side
    65,216,485.80x = 5,963,229,120,383,319
  5. Step 5: Solve for x
    x = 5,963,229,120,383,319/65,216,485.80
  6. Step 6: Final answer
    x = 91,437,449.40

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.