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Finding the Fourth Proportional to 69,136.80, 103,721.64 and 22,389.60

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Solution

The fourth proportional to 69,136.80, 103,721.64 and 22,389.60 is: 33,589.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,136.80 : 103,721.64 = 22,389.60 : x
  2. Step 2: Convert to fraction form
    69,136.80/103,721.64 = 22,389.60/x
  3. Step 3: Cross multiply
    69,136.80x = 103,721.64 × 22,389.60
  4. Step 4: Simplify right side
    69,136.80x = 2,322,286,030.94
  5. Step 5: Solve for x
    x = 2,322,286,030.94/69,136.80
  6. Step 6: Final answer
    x = 33,589.72

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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.