Finding the Fourth Proportional to 138,165.62, 190,668.58 and 78,549.62
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Solution
The fourth proportional to 138,165.62, 190,668.58 and 78,549.62 is: 108,398.49
Step by Step Solution
- Step 1: Write the proportion equation
138,165.62 : 190,668.58 = 78,549.62 : x - Step 2: Convert to fraction form
138,165.62/190,668.58 = 78,549.62/x - Step 3: Cross multiply
138,165.62x = 190,668.58 × 78,549.62 - Step 4: Simplify right side
138,165.62x = 14,976,944,504.94 - Step 5: Solve for x
x = 14,976,944,504.94/138,165.62 - Step 6: Final answer
x = 108,398.49
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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.