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Finding the Fourth Proportional to 77,245.44, 115,861.92 and 30,498.72

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Solution

The fourth proportional to 77,245.44, 115,861.92 and 30,498.72 is: 45,745.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,245.44 : 115,861.92 = 30,498.72 : x
  2. Step 2: Convert to fraction form
    77,245.44/115,861.92 = 30,498.72/x
  3. Step 3: Cross multiply
    77,245.44x = 115,861.92 × 30,498.72
  4. Step 4: Simplify right side
    77,245.44x = 3,533,640,256.74
  5. Step 5: Solve for x
    x = 3,533,640,256.74/77,245.44
  6. Step 6: Final answer
    x = 45,745.62

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1.5x scale

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.