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Finding the Fourth Proportional to 85,408.94, 128,073.44 and 49,880.58

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Solution

The fourth proportional to 85,408.94, 128,073.44 and 49,880.58 is: 74,797.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,408.94 : 128,073.44 = 49,880.58 : x
  2. Step 2: Convert to fraction form
    85,408.94/128,073.44 = 49,880.58/x
  3. Step 3: Cross multiply
    85,408.94x = 128,073.44 × 49,880.58
  4. Step 4: Simplify right side
    85,408.94x = 6,388,377,469.80
  5. Step 5: Solve for x
    x = 6,388,377,469.80/85,408.94
  6. Step 6: Final answer
    x = 74,797.53

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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.