Home / 205,821.40-308,732.10-100,586.20

Finding the Fourth Proportional to 205,821.40, 308,732.10 and 100,586.20

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Solution

The fourth proportional to 205,821.40, 308,732.10 and 100,586.20 is: 150,879.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,821.40 : 308,732.10 = 100,586.20 : x
  2. Step 2: Convert to fraction form
    205,821.40/308,732.10 = 100,586.20/x
  3. Step 3: Cross multiply
    205,821.40x = 308,732.10 × 100,586.20
  4. Step 4: Simplify right side
    205,821.40x = 31,054,188,757.02
  5. Step 5: Solve for x
    x = 31,054,188,757.02/205,821.40
  6. Step 6: Final answer
    x = 150,879.30

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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.