Finding the Fourth Proportional to 138,668.97, 191,346.71 and 78,236.09
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Solution
The fourth proportional to 138,668.97, 191,346.71 and 78,236.09 is: 107,956.50
Step by Step Solution
- Step 1: Write the proportion equation
138,668.97 : 191,346.71 = 78,236.09 : x - Step 2: Convert to fraction form
138,668.97/191,346.71 = 78,236.09/x - Step 3: Cross multiply
138,668.97x = 191,346.71 × 78,236.09 - Step 4: Simplify right side
138,668.97x = 14,970,217,076.85 - Step 5: Solve for x
x = 14,970,217,076.85/138,668.97 - Step 6: Final answer
x = 107,956.50
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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.