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Finding the Fourth Proportional to 100,719.40, 150,906.30 and 48,015.40

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Solution

The fourth proportional to 100,719.40, 150,906.30 and 48,015.40 is: 71,940.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,719.40 : 150,906.30 = 48,015.40 : x
  2. Step 2: Convert to fraction form
    100,719.40/150,906.30 = 48,015.40/x
  3. Step 3: Cross multiply
    100,719.40x = 150,906.30 × 48,015.40
  4. Step 4: Simplify right side
    100,719.40x = 7,245,826,357.02
  5. Step 5: Solve for x
    x = 7,245,826,357.02/100,719.40
  6. Step 6: Final answer
    x = 71,940.72

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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.