Finding the Fourth Proportional to 100,551.06, 138,761.60 and 55,230.09
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Solution
The fourth proportional to 100,551.06, 138,761.60 and 55,230.09 is: 76,218.15
Step by Step Solution
- Step 1: Write the proportion equation
100,551.06 : 138,761.60 = 55,230.09 : x - Step 2: Convert to fraction form
100,551.06/138,761.60 = 55,230.09/x - Step 3: Cross multiply
100,551.06x = 138,761.60 × 55,230.09 - Step 4: Simplify right side
100,551.06x = 7,663,815,656.54 - Step 5: Solve for x
x = 7,663,815,656.54/100,551.06 - Step 6: Final answer
x = 76,218.15
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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.