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Finding the Fourth Proportional to 123,726.57, 170,745.98 and 67,137.99

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Solution

The fourth proportional to 123,726.57, 170,745.98 and 67,137.99 is: 92,652.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,726.57 : 170,745.98 = 67,137.99 : x
  2. Step 2: Convert to fraction form
    123,726.57/170,745.98 = 67,137.99/x
  3. Step 3: Cross multiply
    123,726.57x = 170,745.98 × 67,137.99
  4. Step 4: Simplify right side
    123,726.57x = 11,463,541,562.09
  5. Step 5: Solve for x
    x = 11,463,541,562.09/123,726.57
  6. Step 6: Final answer
    x = 92,652.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.