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Finding the Fourth Proportional to 48,981.70, 68,729.90 and 48,981.70

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Solution

The fourth proportional to 48,981.70, 68,729.90 and 48,981.70 is: 68,729.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,981.70 : 68,729.90 = 48,981.70 : x
  2. Step 2: Convert to fraction form
    48,981.70/68,729.90 = 48,981.70/x
  3. Step 3: Cross multiply
    48,981.70x = 68,729.90 × 48,981.70
  4. Step 4: Simplify right side
    48,981.70x = 3,366,507,342.83
  5. Step 5: Solve for x
    x = 3,366,507,342.83/48,981.70
  6. Step 6: Final answer
    x = 68,729.90

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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.