Home / 212,921.70-319,289.07-79,708.54

Finding the Fourth Proportional to 212,921.70, 319,289.07 and 79,708.54

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Solution

The fourth proportional to 212,921.70, 319,289.07 and 79,708.54 is: 119,527.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,921.70 : 319,289.07 = 79,708.54 : x
  2. Step 2: Convert to fraction form
    212,921.70/319,289.07 = 79,708.54/x
  3. Step 3: Cross multiply
    212,921.70x = 319,289.07 × 79,708.54
  4. Step 4: Simplify right side
    212,921.70x = 25,450,064,809.44
  5. Step 5: Solve for x
    x = 25,450,064,809.44/212,921.70
  6. Step 6: Final answer
    x = 119,527.81

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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.