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Finding the Fourth Proportional to 69,325.20, 103,914.90 and 39,679.20

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Solution

The fourth proportional to 69,325.20, 103,914.90 and 39,679.20 is: 59,477.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,325.20 : 103,914.90 = 39,679.20 : x
  2. Step 2: Convert to fraction form
    69,325.20/103,914.90 = 39,679.20/x
  3. Step 3: Cross multiply
    69,325.20x = 103,914.90 × 39,679.20
  4. Step 4: Simplify right side
    69,325.20x = 4,123,260,100.08
  5. Step 5: Solve for x
    x = 4,123,260,100.08/69,325.20
  6. Step 6: Final answer
    x = 59,477.07

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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.