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Finding the Fourth Proportional to 120,469.80, 180,704.70 and 58,261.80

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Solution

The fourth proportional to 120,469.80, 180,704.70 and 58,261.80 is: 87,392.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,469.80 : 180,704.70 = 58,261.80 : x
  2. Step 2: Convert to fraction form
    120,469.80/180,704.70 = 58,261.80/x
  3. Step 3: Cross multiply
    120,469.80x = 180,704.70 × 58,261.80
  4. Step 4: Simplify right side
    120,469.80x = 10,528,181,090.46
  5. Step 5: Solve for x
    x = 10,528,181,090.46/120,469.80
  6. Step 6: Final answer
    x = 87,392.70

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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.