Home / 212,756.50-319,189.44-79,638.68

Finding the Fourth Proportional to 212,756.50, 319,189.44 and 79,638.68

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Solution

The fourth proportional to 212,756.50, 319,189.44 and 79,638.68 is: 119,478.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,756.50 : 319,189.44 = 79,638.68 : x
  2. Step 2: Convert to fraction form
    212,756.50/319,189.44 = 79,638.68/x
  3. Step 3: Cross multiply
    212,756.50x = 319,189.44 × 79,638.68
  4. Step 4: Simplify right side
    212,756.50x = 25,419,825,671.54
  5. Step 5: Solve for x
    x = 25,419,825,671.54/212,756.50
  6. Step 6: Final answer
    x = 119,478.49

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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.