Finding the Fourth Proportional to 100,486.75, 138,672.26 and 62,782.87
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Solution
The fourth proportional to 100,486.75, 138,672.26 and 62,782.87 is: 86,640.70
Step by Step Solution
- Step 1: Write the proportion equation
100,486.75 : 138,672.26 = 62,782.87 : x - Step 2: Convert to fraction form
100,486.75/138,672.26 = 62,782.87/x - Step 3: Cross multiply
100,486.75x = 138,672.26 × 62,782.87 - Step 4: Simplify right side
100,486.75x = 8,706,242,472.19 - Step 5: Solve for x
x = 8,706,242,472.19/100,486.75 - Step 6: Final answer
x = 86,640.70
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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.