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Finding the Fourth Proportional to 199,355.28, 298,958.40 and 80,986.74

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Solution

The fourth proportional to 199,355.28, 298,958.40 and 80,986.74 is: 121,449.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,355.28 : 298,958.40 = 80,986.74 : x
  2. Step 2: Convert to fraction form
    199,355.28/298,958.40 = 80,986.74/x
  3. Step 3: Cross multiply
    199,355.28x = 298,958.40 × 80,986.74
  4. Step 4: Simplify right side
    199,355.28x = 24,211,666,211.62
  5. Step 5: Solve for x
    x = 24,211,666,211.62/199,355.28
  6. Step 6: Final answer
    x = 121,449.84

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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.