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Finding the Fourth Proportional to 61,279.92, 91,939.68 and 30,093.30

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Solution

The fourth proportional to 61,279.92, 91,939.68 and 30,093.30 is: 45,149.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,279.92 : 91,939.68 = 30,093.30 : x
  2. Step 2: Convert to fraction form
    61,279.92/91,939.68 = 30,093.30/x
  3. Step 3: Cross multiply
    61,279.92x = 91,939.68 × 30,093.30
  4. Step 4: Simplify right side
    61,279.92x = 2,766,768,372.14
  5. Step 5: Solve for x
    x = 2,766,768,372.14/61,279.92
  6. Step 6: Final answer
    x = 45,149.67

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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.