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Finding the Fourth Proportional to 69,763.86, 104,645.77 and 20,515.86

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Solution

The fourth proportional to 69,763.86, 104,645.77 and 20,515.86 is: 30,773.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,763.86 : 104,645.77 = 20,515.86 : x
  2. Step 2: Convert to fraction form
    69,763.86/104,645.77 = 20,515.86/x
  3. Step 3: Cross multiply
    69,763.86x = 104,645.77 × 20,515.86
  4. Step 4: Simplify right side
    69,763.86x = 2,146,897,966.91
  5. Step 5: Solve for x
    x = 2,146,897,966.91/69,763.86
  6. Step 6: Final answer
    x = 30,773.78

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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.