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Finding the Fourth Proportional to 69,216.60, 103,940.10 and 38,074.20

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Solution

The fourth proportional to 69,216.60, 103,940.10 and 38,074.20 is: 57,174.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,216.60 : 103,940.10 = 38,074.20 : x
  2. Step 2: Convert to fraction form
    69,216.60/103,940.10 = 38,074.20/x
  3. Step 3: Cross multiply
    69,216.60x = 103,940.10 × 38,074.20
  4. Step 4: Simplify right side
    69,216.60x = 3,957,436,155.42
  5. Step 5: Solve for x
    x = 3,957,436,155.42/69,216.60
  6. Step 6: Final answer
    x = 57,174.67

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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.