Finding the Fourth Proportional to 138,091.68, 190,564.92 and 77,662.08
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Solution
The fourth proportional to 138,091.68, 190,564.92 and 77,662.08 is: 107,172.77
Step by Step Solution
- Step 1: Write the proportion equation
138,091.68 : 190,564.92 = 77,662.08 : x - Step 2: Convert to fraction form
138,091.68/190,564.92 = 77,662.08/x - Step 3: Cross multiply
138,091.68x = 190,564.92 × 77,662.08 - Step 4: Simplify right side
138,091.68x = 14,799,668,062.23 - Step 5: Solve for x
x = 14,799,668,062.23/138,091.68 - Step 6: Final answer
x = 107,172.77
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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.