Home / 71,121.62-98,147.25-39,289.85

Finding the Fourth Proportional to 71,121.62, 98,147.25 and 39,289.85

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Solution

The fourth proportional to 71,121.62, 98,147.25 and 39,289.85 is: 54,219.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,121.62 : 98,147.25 = 39,289.85 : x
  2. Step 2: Convert to fraction form
    71,121.62/98,147.25 = 39,289.85/x
  3. Step 3: Cross multiply
    71,121.62x = 98,147.25 × 39,289.85
  4. Step 4: Simplify right side
    71,121.62x = 3,856,190,730.41
  5. Step 5: Solve for x
    x = 3,856,190,730.41/71,121.62
  6. Step 6: Final answer
    x = 54,219.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.