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Finding the Fourth Proportional to 69,763.41, 104,645.12 and 20,515.41

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Solution

The fourth proportional to 69,763.41, 104,645.12 and 20,515.41 is: 30,773.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,763.41 : 104,645.12 = 20,515.41 : x
  2. Step 2: Convert to fraction form
    69,763.41/104,645.12 = 20,515.41/x
  3. Step 3: Cross multiply
    69,763.41x = 104,645.12 × 20,515.41
  4. Step 4: Simplify right side
    69,763.41x = 2,146,837,438.72
  5. Step 5: Solve for x
    x = 2,146,837,438.72/69,763.41
  6. Step 6: Final answer
    x = 30,773.12

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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.