Home / 198,723.60-298,138.20-86,355.60

Finding the Fourth Proportional to 198,723.60, 298,138.20 and 86,355.60

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Solution

The fourth proportional to 198,723.60, 298,138.20 and 86,355.60 is: 129,556.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,723.60 : 298,138.20 = 86,355.60 : x
  2. Step 2: Convert to fraction form
    198,723.60/298,138.20 = 86,355.60/x
  3. Step 3: Cross multiply
    198,723.60x = 298,138.20 × 86,355.60
  4. Step 4: Simplify right side
    198,723.60x = 25,745,903,143.92
  5. Step 5: Solve for x
    x = 25,745,903,143.92/198,723.60
  6. Step 6: Final answer
    x = 129,556.34

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1.5x scale

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.