Finding the Fourth Proportional to 259,124.64, 388,668.21 and 81,682.44
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Solution
The fourth proportional to 259,124.64, 388,668.21 and 81,682.44 is: 122,517.75
Step by Step Solution
- Step 1: Write the proportion equation
259,124.64 : 388,668.21 = 81,682.44 : x - Step 2: Convert to fraction form
259,124.64/388,668.21 = 81,682.44/x - Step 3: Cross multiply
259,124.64x = 388,668.21 × 81,682.44 - Step 4: Simplify right side
259,124.64x = 31,747,367,743.23 - Step 5: Solve for x
x = 31,747,367,743.23/259,124.64 - Step 6: Final answer
x = 122,517.75
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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.