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Finding the Fourth Proportional to 69,136.74, 103,729.41 and 39,579.30

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Solution

The fourth proportional to 69,136.74, 103,729.41 and 39,579.30 is: 59,382.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,136.74 : 103,729.41 = 39,579.30 : x
  2. Step 2: Convert to fraction form
    69,136.74/103,729.41 = 39,579.30/x
  3. Step 3: Cross multiply
    69,136.74x = 103,729.41 × 39,579.30
  4. Step 4: Simplify right side
    69,136.74x = 4,105,537,437.21
  5. Step 5: Solve for x
    x = 4,105,537,437.21/69,136.74
  6. Step 6: Final answer
    x = 59,382.86

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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.