Home / 221,015.76-331,621.65-115,809.72

Finding the Fourth Proportional to 221,015.76, 331,621.65 and 115,809.72

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Solution

The fourth proportional to 221,015.76, 331,621.65 and 115,809.72 is: 173,765.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,015.76 : 331,621.65 = 115,809.72 : x
  2. Step 2: Convert to fraction form
    221,015.76/331,621.65 = 115,809.72/x
  3. Step 3: Cross multiply
    221,015.76x = 331,621.65 × 115,809.72
  4. Step 4: Simplify right side
    221,015.76x = 38,405,010,432.44
  5. Step 5: Solve for x
    x = 38,405,010,432.44/221,015.76
  6. Step 6: Final answer
    x = 173,765.94

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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.