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Finding the Fourth Proportional to 218,879.30, 328,063.80 and 100,562.60

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Solution

The fourth proportional to 218,879.30, 328,063.80 and 100,562.60 is: 150,726.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,879.30 : 328,063.80 = 100,562.60 : x
  2. Step 2: Convert to fraction form
    218,879.30/328,063.80 = 100,562.60/x
  3. Step 3: Cross multiply
    218,879.30x = 328,063.80 × 100,562.60
  4. Step 4: Simplify right side
    218,879.30x = 32,990,948,693.88
  5. Step 5: Solve for x
    x = 32,990,948,693.88/218,879.30
  6. Step 6: Final answer
    x = 150,726.67

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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.