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Finding the Fourth Proportional to 80,913, 121,375.80 and 36,564.60

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Solution

The fourth proportional to 80,913, 121,375.80 and 36,564.60 is: 54,849.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,913 : 121,375.80 = 36,564.60 : x
  2. Step 2: Convert to fraction form
    80,913/121,375.80 = 36,564.60/x
  3. Step 3: Cross multiply
    80,913x = 121,375.80 × 36,564.60
  4. Step 4: Simplify right side
    80,913x = 4,438,057,576.68
  5. Step 5: Solve for x
    x = 4,438,057,576.68/80,913
  6. Step 6: Final answer
    x = 54,849.75

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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.