Home / 80,530.10-120,795-20,558.55

Finding the Fourth Proportional to 80,530.10, 120,795 and 20,558.55

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Solution

The fourth proportional to 80,530.10, 120,795 and 20,558.55 is: 30,837.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,530.10 : 120,795 = 20,558.55 : x
  2. Step 2: Convert to fraction form
    80,530.10/120,795 = 20,558.55/x
  3. Step 3: Cross multiply
    80,530.10x = 120,795 × 20,558.55
  4. Step 4: Simplify right side
    80,530.10x = 2,483,370,047.25
  5. Step 5: Solve for x
    x = 2,483,370,047.25/80,530.10
  6. Step 6: Final answer
    x = 30,837.79

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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.