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Finding the Fourth Proportional to 56,907.70, 85,361.55 and 53,845.90

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Solution

The fourth proportional to 56,907.70, 85,361.55 and 53,845.90 is: 80,768.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,907.70 : 85,361.55 = 53,845.90 : x
  2. Step 2: Convert to fraction form
    56,907.70/85,361.55 = 53,845.90/x
  3. Step 3: Cross multiply
    56,907.70x = 85,361.55 × 53,845.90
  4. Step 4: Simplify right side
    56,907.70x = 4,596,369,485.15
  5. Step 5: Solve for x
    x = 4,596,369,485.15/56,907.70
  6. Step 6: Final answer
    x = 80,768.85

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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.