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Finding the Fourth Proportional to 69,071.20, 103,621.20 and 39,464.80

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Solution

The fourth proportional to 69,071.20, 103,621.20 and 39,464.80 is: 59,205.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,071.20 : 103,621.20 = 39,464.80 : x
  2. Step 2: Convert to fraction form
    69,071.20/103,621.20 = 39,464.80/x
  3. Step 3: Cross multiply
    69,071.20x = 103,621.20 × 39,464.80
  4. Step 4: Simplify right side
    69,071.20x = 4,089,389,933.76
  5. Step 5: Solve for x
    x = 4,089,389,933.76/69,071.20
  6. Step 6: Final answer
    x = 59,205.43

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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.