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Finding the Fourth Proportional to 190,603.53, 285,885.18 and 78,295.59

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Solution

The fourth proportional to 190,603.53, 285,885.18 and 78,295.59 is: 117,435.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,603.53 : 285,885.18 = 78,295.59 : x
  2. Step 2: Convert to fraction form
    190,603.53/285,885.18 = 78,295.59/x
  3. Step 3: Cross multiply
    190,603.53x = 285,885.18 × 78,295.59
  4. Step 4: Simplify right side
    190,603.53x = 22,383,548,840.36
  5. Step 5: Solve for x
    x = 22,383,548,840.36/190,603.53
  6. Step 6: Final answer
    x = 117,435.12

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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.