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Finding the Fourth Proportional to 69,396.89, 104,079.77 and 31,920.98

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Solution

The fourth proportional to 69,396.89, 104,079.77 and 31,920.98 is: 47,874.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,396.89 : 104,079.77 = 31,920.98 : x
  2. Step 2: Convert to fraction form
    69,396.89/104,079.77 = 31,920.98/x
  3. Step 3: Cross multiply
    69,396.89x = 104,079.77 × 31,920.98
  4. Step 4: Simplify right side
    69,396.89x = 3,322,327,815.98
  5. Step 5: Solve for x
    x = 3,322,327,815.98/69,396.89
  6. Step 6: Final answer
    x = 47,874.30

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1.5x scale

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.