Home / 205,728.75-308,390.67-120,231.09

Finding the Fourth Proportional to 205,728.75, 308,390.67 and 120,231.09

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Solution

The fourth proportional to 205,728.75, 308,390.67 and 120,231.09 is: 180,228.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,728.75 : 308,390.67 = 120,231.09 : x
  2. Step 2: Convert to fraction form
    205,728.75/308,390.67 = 120,231.09/x
  3. Step 3: Cross multiply
    205,728.75x = 308,390.67 × 120,231.09
  4. Step 4: Simplify right side
    205,728.75x = 37,078,146,399.93
  5. Step 5: Solve for x
    x = 37,078,146,399.93/205,728.75
  6. Step 6: Final answer
    x = 180,228.32

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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.