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Finding the Fourth Proportional to 100,708.32, 150,990 and 47,370.48

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Solution

The fourth proportional to 100,708.32, 150,990 and 47,370.48 is: 71,021.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,708.32 : 150,990 = 47,370.48 : x
  2. Step 2: Convert to fraction form
    100,708.32/150,990 = 47,370.48/x
  3. Step 3: Cross multiply
    100,708.32x = 150,990 × 47,370.48
  4. Step 4: Simplify right side
    100,708.32x = 7,152,468,775.20
  5. Step 5: Solve for x
    x = 7,152,468,775.20/100,708.32
  6. Step 6: Final answer
    x = 71,021.63

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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.