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Finding the Fourth Proportional to 50,815.68, 76,128.48 and 45,324.96

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Solution

The fourth proportional to 50,815.68, 76,128.48 and 45,324.96 is: 67,902.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,815.68 : 76,128.48 = 45,324.96 : x
  2. Step 2: Convert to fraction form
    50,815.68/76,128.48 = 45,324.96/x
  3. Step 3: Cross multiply
    50,815.68x = 76,128.48 × 45,324.96
  4. Step 4: Simplify right side
    50,815.68x = 3,450,520,310.86
  5. Step 5: Solve for x
    x = 3,450,520,310.86/50,815.68
  6. Step 6: Final answer
    x = 67,902.67

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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.