Finding the Fourth Proportional to 129,236.22, 178,221.60 and 83,897.28
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Solution
The fourth proportional to 129,236.22, 178,221.60 and 83,897.28 is: 115,697.50
Step by Step Solution
- Step 1: Write the proportion equation
129,236.22 : 178,221.60 = 83,897.28 : x - Step 2: Convert to fraction form
129,236.22/178,221.60 = 83,897.28/x - Step 3: Cross multiply
129,236.22x = 178,221.60 × 83,897.28 - Step 4: Simplify right side
129,236.22x = 14,952,307,477.25 - Step 5: Solve for x
x = 14,952,307,477.25/129,236.22 - Step 6: Final answer
x = 115,697.50
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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.