Finding the Fourth Proportional to 129,025.13, 178,048.75 and 71,668.09
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Solution
The fourth proportional to 129,025.13, 178,048.75 and 71,668.09 is: 98,898.67
Step by Step Solution
- Step 1: Write the proportion equation
129,025.13 : 178,048.75 = 71,668.09 : x - Step 2: Convert to fraction form
129,025.13/178,048.75 = 71,668.09/x - Step 3: Cross multiply
129,025.13x = 178,048.75 × 71,668.09 - Step 4: Simplify right side
129,025.13x = 12,760,413,839.39 - Step 5: Solve for x
x = 12,760,413,839.39/129,025.13 - Step 6: Final answer
x = 98,898.67
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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.