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Finding the Fourth Proportional to 279,479.60, 419,181.60 and 111,123.80

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Solution

The fourth proportional to 279,479.60, 419,181.60 and 111,123.80 is: 166,670.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,479.60 : 419,181.60 = 111,123.80 : x
  2. Step 2: Convert to fraction form
    279,479.60/419,181.60 = 111,123.80/x
  3. Step 3: Cross multiply
    279,479.60x = 419,181.60 × 111,123.80
  4. Step 4: Simplify right side
    279,479.60x = 46,581,052,282.08
  5. Step 5: Solve for x
    x = 46,581,052,282.08/279,479.60
  6. Step 6: Final answer
    x = 166,670.67

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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.