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Finding the Fourth Proportional to 85,850.67, 128,794.43 and 28,930.20

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Solution

The fourth proportional to 85,850.67, 128,794.43 and 28,930.20 is: 43,401.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,850.67 : 128,794.43 = 28,930.20 : x
  2. Step 2: Convert to fraction form
    85,850.67/128,794.43 = 28,930.20/x
  3. Step 3: Cross multiply
    85,850.67x = 128,794.43 × 28,930.20
  4. Step 4: Simplify right side
    85,850.67x = 3,726,048,474.14
  5. Step 5: Solve for x
    x = 3,726,048,474.14/85,850.67
  6. Step 6: Final answer
    x = 43,401.51

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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.