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Finding the Fourth Proportional to 168,939.34, 253,408.98 and 77,745.54

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Solution

The fourth proportional to 168,939.34, 253,408.98 and 77,745.54 is: 116,618.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,939.34 : 253,408.98 = 77,745.54 : x
  2. Step 2: Convert to fraction form
    168,939.34/253,408.98 = 77,745.54/x
  3. Step 3: Cross multiply
    168,939.34x = 253,408.98 × 77,745.54
  4. Step 4: Simplify right side
    168,939.34x = 19,701,417,990.95
  5. Step 5: Solve for x
    x = 19,701,417,990.95/168,939.34
  6. Step 6: Final answer
    x = 116,618.30

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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.