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Finding the Fourth Proportional to 69,135.76, 103,720.20 and 22,388.72

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Solution

The fourth proportional to 69,135.76, 103,720.20 and 22,388.72 is: 33,588.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,135.76 : 103,720.20 = 22,388.72 : x
  2. Step 2: Convert to fraction form
    69,135.76/103,720.20 = 22,388.72/x
  3. Step 3: Cross multiply
    69,135.76x = 103,720.20 × 22,388.72
  4. Step 4: Simplify right side
    69,135.76x = 2,322,162,516.14
  5. Step 5: Solve for x
    x = 2,322,162,516.14/69,135.76
  6. Step 6: Final answer
    x = 33,588.44

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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.