Finding the Fourth Proportional to 100,518.05, 138,717.09 and 55,198.95
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Solution
The fourth proportional to 100,518.05, 138,717.09 and 55,198.95 is: 76,175.75
Step by Step Solution
- Step 1: Write the proportion equation
100,518.05 : 138,717.09 = 55,198.95 : x - Step 2: Convert to fraction form
100,518.05/138,717.09 = 55,198.95/x - Step 3: Cross multiply
100,518.05x = 138,717.09 × 55,198.95 - Step 4: Simplify right side
100,518.05x = 7,657,037,715.06 - Step 5: Solve for x
x = 7,657,037,715.06/100,518.05 - Step 6: Final answer
x = 76,175.75
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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.