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Finding the Fourth Proportional to 71,431.41, 107,136.59 and 18,844.59

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Solution

The fourth proportional to 71,431.41, 107,136.59 and 18,844.59 is: 28,264.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,431.41 : 107,136.59 = 18,844.59 : x
  2. Step 2: Convert to fraction form
    71,431.41/107,136.59 = 18,844.59/x
  3. Step 3: Cross multiply
    71,431.41x = 107,136.59 × 18,844.59
  4. Step 4: Simplify right side
    71,431.41x = 2,018,945,018.33
  5. Step 5: Solve for x
    x = 2,018,945,018.33/71,431.41
  6. Step 6: Final answer
    x = 28,264.11

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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.