Home / 280,929.33-421,331.22-81,205.20

Finding the Fourth Proportional to 280,929.33, 421,331.22 and 81,205.20

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Solution

The fourth proportional to 280,929.33, 421,331.22 and 81,205.20 is: 121,789.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,929.33 : 421,331.22 = 81,205.20 : x
  2. Step 2: Convert to fraction form
    280,929.33/421,331.22 = 81,205.20/x
  3. Step 3: Cross multiply
    280,929.33x = 421,331.22 × 81,205.20
  4. Step 4: Simplify right side
    280,929.33x = 34,214,285,986.34
  5. Step 5: Solve for x
    x = 34,214,285,986.34/280,929.33
  6. Step 6: Final answer
    x = 121,789.65

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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.