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Finding the Fourth Proportional to 79,589.32, 119,384.04 and 20,425

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Solution

The fourth proportional to 79,589.32, 119,384.04 and 20,425 is: 30,637.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,589.32 : 119,384.04 = 20,425 : x
  2. Step 2: Convert to fraction form
    79,589.32/119,384.04 = 20,425/x
  3. Step 3: Cross multiply
    79,589.32x = 119,384.04 × 20,425
  4. Step 4: Simplify right side
    79,589.32x = 2,438,419,017
  5. Step 5: Solve for x
    x = 2,438,419,017/79,589.32
  6. Step 6: Final answer
    x = 30,637.52

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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.