Finding the Fourth Proportional to 138,615.04, 191,272.69 and 78,186.68
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Solution
The fourth proportional to 138,615.04, 191,272.69 and 78,186.68 is: 107,888.56
Step by Step Solution
- Step 1: Write the proportion equation
138,615.04 : 191,272.69 = 78,186.68 : x - Step 2: Convert to fraction form
138,615.04/191,272.69 = 78,186.68/x - Step 3: Cross multiply
138,615.04x = 191,272.69 × 78,186.68 - Step 4: Simplify right side
138,615.04x = 14,954,976,605.77 - Step 5: Solve for x
x = 14,954,976,605.77/138,615.04 - Step 6: Final answer
x = 107,888.56
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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.