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Finding the Fourth Proportional to 69,570, 104,372.28 and 20,322

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Solution

The fourth proportional to 69,570, 104,372.28 and 20,322 is: 30,488.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,570 : 104,372.28 = 20,322 : x
  2. Step 2: Convert to fraction form
    69,570/104,372.28 = 20,322/x
  3. Step 3: Cross multiply
    69,570x = 104,372.28 × 20,322
  4. Step 4: Simplify right side
    69,570x = 2,121,053,474.16
  5. Step 5: Solve for x
    x = 2,121,053,474.16/69,570
  6. Step 6: Final answer
    x = 30,488.05

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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.