Home / 80,771.47-121,161.27-30,855.89

Finding the Fourth Proportional to 80,771.47, 121,161.27 and 30,855.89

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Solution

The fourth proportional to 80,771.47, 121,161.27 and 30,855.89 is: 46,285.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,771.47 : 121,161.27 = 30,855.89 : x
  2. Step 2: Convert to fraction form
    80,771.47/121,161.27 = 30,855.89/x
  3. Step 3: Cross multiply
    80,771.47x = 121,161.27 × 30,855.89
  4. Step 4: Simplify right side
    80,771.47x = 3,738,538,819.38
  5. Step 5: Solve for x
    x = 3,738,538,819.38/80,771.47
  6. Step 6: Final answer
    x = 46,285.39

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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.