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Finding the Fourth Proportional to 91,408.80, 137,122.80 and 29,064.80

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Solution

The fourth proportional to 91,408.80, 137,122.80 and 29,064.80 is: 43,600.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,408.80 : 137,122.80 = 29,064.80 : x
  2. Step 2: Convert to fraction form
    91,408.80/137,122.80 = 29,064.80/x
  3. Step 3: Cross multiply
    91,408.80x = 137,122.80 × 29,064.80
  4. Step 4: Simplify right side
    91,408.80x = 3,985,446,757.44
  5. Step 5: Solve for x
    x = 3,985,446,757.44/91,408.80
  6. Step 6: Final answer
    x = 43,600.25

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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.