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Finding the Fourth Proportional to 85,942.62, 128,920.06 and 36,015.44

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Solution

The fourth proportional to 85,942.62, 128,920.06 and 36,015.44 is: 54,025.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,942.62 : 128,920.06 = 36,015.44 : x
  2. Step 2: Convert to fraction form
    85,942.62/128,920.06 = 36,015.44/x
  3. Step 3: Cross multiply
    85,942.62x = 128,920.06 × 36,015.44
  4. Step 4: Simplify right side
    85,942.62x = 4,643,112,685.73
  5. Step 5: Solve for x
    x = 4,643,112,685.73/85,942.62
  6. Step 6: Final answer
    x = 54,025.73

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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.