Home / 80,853.20-121,279.80-45,861.20

Finding the Fourth Proportional to 80,853.20, 121,279.80 and 45,861.20

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Solution

The fourth proportional to 80,853.20, 121,279.80 and 45,861.20 is: 68,791.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,853.20 : 121,279.80 = 45,861.20 : x
  2. Step 2: Convert to fraction form
    80,853.20/121,279.80 = 45,861.20/x
  3. Step 3: Cross multiply
    80,853.20x = 121,279.80 × 45,861.20
  4. Step 4: Simplify right side
    80,853.20x = 5,562,037,163.76
  5. Step 5: Solve for x
    x = 5,562,037,163.76/80,853.20
  6. Step 6: Final answer
    x = 68,791.80

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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.