Home / 213,629.48-320,465.88-80,621.52

Finding the Fourth Proportional to 213,629.48, 320,465.88 and 80,621.52

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Solution

The fourth proportional to 213,629.48, 320,465.88 and 80,621.52 is: 120,940.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,629.48 : 320,465.88 = 80,621.52 : x
  2. Step 2: Convert to fraction form
    213,629.48/320,465.88 = 80,621.52/x
  3. Step 3: Cross multiply
    213,629.48x = 320,465.88 × 80,621.52
  4. Step 4: Simplify right side
    213,629.48x = 25,836,446,353.74
  5. Step 5: Solve for x
    x = 25,836,446,353.74/213,629.48
  6. Step 6: Final answer
    x = 120,940.45

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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.