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Finding the Fourth Proportional to 79,971.99, 119,958.14 and 20,807.56

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Solution

The fourth proportional to 79,971.99, 119,958.14 and 20,807.56 is: 31,211.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,971.99 : 119,958.14 = 20,807.56 : x
  2. Step 2: Convert to fraction form
    79,971.99/119,958.14 = 20,807.56/x
  3. Step 3: Cross multiply
    79,971.99x = 119,958.14 × 20,807.56
  4. Step 4: Simplify right side
    79,971.99x = 2,496,036,195.54
  5. Step 5: Solve for x
    x = 2,496,036,195.54/79,971.99
  6. Step 6: Final answer
    x = 31,211.38

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1.5x scale

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.