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Finding the Fourth Proportional to 69,830.40, 104,745.60 and 66,604.80

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Solution

The fourth proportional to 69,830.40, 104,745.60 and 66,604.80 is: 99,907.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,830.40 : 104,745.60 = 66,604.80 : x
  2. Step 2: Convert to fraction form
    69,830.40/104,745.60 = 66,604.80/x
  3. Step 3: Cross multiply
    69,830.40x = 104,745.60 × 66,604.80
  4. Step 4: Simplify right side
    69,830.40x = 6,976,559,738.88
  5. Step 5: Solve for x
    x = 6,976,559,738.88/69,830.40
  6. Step 6: Final answer
    x = 99,907.20

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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.