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Finding the Fourth Proportional to 259,130.96, 388,761.72 and 81,630.80

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Solution

The fourth proportional to 259,130.96, 388,761.72 and 81,630.80 is: 122,466.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,130.96 : 388,761.72 = 81,630.80 : x
  2. Step 2: Convert to fraction form
    259,130.96/388,761.72 = 81,630.80/x
  3. Step 3: Cross multiply
    259,130.96x = 388,761.72 × 81,630.80
  4. Step 4: Simplify right side
    259,130.96x = 31,734,930,212.98
  5. Step 5: Solve for x
    x = 31,734,930,212.98/259,130.96
  6. Step 6: Final answer
    x = 122,466.76

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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.