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Finding the Fourth Proportional to 103,625.80, 155,438.68 and 28,745.94

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Solution

The fourth proportional to 103,625.80, 155,438.68 and 28,745.94 is: 43,118.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,625.80 : 155,438.68 = 28,745.94 : x
  2. Step 2: Convert to fraction form
    103,625.80/155,438.68 = 28,745.94/x
  3. Step 3: Cross multiply
    103,625.80x = 155,438.68 × 28,745.94
  4. Step 4: Simplify right side
    103,625.80x = 4,468,230,968.96
  5. Step 5: Solve for x
    x = 4,468,230,968.96/103,625.80
  6. Step 6: Final answer
    x = 43,118.90

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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.