Home / 79,938.41-119,907.97-20,769.89

Finding the Fourth Proportional to 79,938.41, 119,907.97 and 20,769.89

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Solution

The fourth proportional to 79,938.41, 119,907.97 and 20,769.89 is: 31,154.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,938.41 : 119,907.97 = 20,769.89 : x
  2. Step 2: Convert to fraction form
    79,938.41/119,907.97 = 20,769.89/x
  3. Step 3: Cross multiply
    79,938.41x = 119,907.97 × 20,769.89
  4. Step 4: Simplify right side
    79,938.41x = 2,490,474,695.56
  5. Step 5: Solve for x
    x = 2,490,474,695.56/79,938.41
  6. Step 6: Final answer
    x = 31,154.92

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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.