Finding the Fourth Proportional to 72,948.09, 100,668.37 and 39,414.09
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Solution
The fourth proportional to 72,948.09, 100,668.37 and 39,414.09 is: 54,391.45
Step by Step Solution
- Step 1: Write the proportion equation
72,948.09 : 100,668.37 = 39,414.09 : x - Step 2: Convert to fraction form
72,948.09/100,668.37 = 39,414.09/x - Step 3: Cross multiply
72,948.09x = 100,668.37 × 39,414.09 - Step 4: Simplify right side
72,948.09x = 3,967,752,548.21 - Step 5: Solve for x
x = 3,967,752,548.21/72,948.09 - Step 6: Final answer
x = 54,391.45
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1.5x scale
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.