Finding the Fourth Proportional to 100,682.25, 138,929.99 and 80,531.79
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Solution
The fourth proportional to 100,682.25, 138,929.99 and 80,531.79 is: 111,124.66
Step by Step Solution
- Step 1: Write the proportion equation
100,682.25 : 138,929.99 = 80,531.79 : x - Step 2: Convert to fraction form
100,682.25/138,929.99 = 80,531.79/x - Step 3: Cross multiply
100,682.25x = 138,929.99 × 80,531.79 - Step 4: Simplify right side
100,682.25x = 11,188,280,779.38 - Step 5: Solve for x
x = 11,188,280,779.38/100,682.25 - Step 6: Final answer
x = 111,124.66
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.