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Finding the Fourth Proportional to 69,158.82, 103,701.11 and 21,765.05

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Solution

The fourth proportional to 69,158.82, 103,701.11 and 21,765.05 is: 32,635.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,158.82 : 103,701.11 = 21,765.05 : x
  2. Step 2: Convert to fraction form
    69,158.82/103,701.11 = 21,765.05/x
  3. Step 3: Cross multiply
    69,158.82x = 103,701.11 × 21,765.05
  4. Step 4: Simplify right side
    69,158.82x = 2,257,059,216.87
  5. Step 5: Solve for x
    x = 2,257,059,216.87/69,158.82
  6. Step 6: Final answer
    x = 32,635.88

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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.