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Finding the Fourth Proportional to 259,472.80, 389,079.60 and 119,072.80

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Solution

The fourth proportional to 259,472.80, 389,079.60 and 119,072.80 is: 178,549.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,472.80 : 389,079.60 = 119,072.80 : x
  2. Step 2: Convert to fraction form
    259,472.80/389,079.60 = 119,072.80/x
  3. Step 3: Cross multiply
    259,472.80x = 389,079.60 × 119,072.80
  4. Step 4: Simplify right side
    259,472.80x = 46,328,797,394.88
  5. Step 5: Solve for x
    x = 46,328,797,394.88/259,472.80
  6. Step 6: Final answer
    x = 178,549.73

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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.