Home / 80,388.90-120,515.31-30,441.47

Finding the Fourth Proportional to 80,388.90, 120,515.31 and 30,441.47

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Solution

The fourth proportional to 80,388.90, 120,515.31 and 30,441.47 is: 45,636.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,388.90 : 120,515.31 = 30,441.47 : x
  2. Step 2: Convert to fraction form
    80,388.90/120,515.31 = 30,441.47/x
  3. Step 3: Cross multiply
    80,388.90x = 120,515.31 × 30,441.47
  4. Step 4: Simplify right side
    80,388.90x = 3,668,662,591.33
  5. Step 5: Solve for x
    x = 3,668,662,591.33/80,388.90
  6. Step 6: Final answer
    x = 45,636.43

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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.