Finding the Fourth Proportional to 100,680.99, 138,942.80 and 55,356.63
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Solution
The fourth proportional to 100,680.99, 138,942.80 and 55,356.63 is: 76,393.81
Step by Step Solution
- Step 1: Write the proportion equation
100,680.99 : 138,942.80 = 55,356.63 : x - Step 2: Convert to fraction form
100,680.99/138,942.80 = 55,356.63/x - Step 3: Cross multiply
100,680.99x = 138,942.80 × 55,356.63 - Step 4: Simplify right side
100,680.99x = 7,691,404,893.98 - Step 5: Solve for x
x = 7,691,404,893.98/100,680.99 - Step 6: Final answer
x = 76,393.81
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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.