Finding the Fourth Proportional to 129,189.74, 178,269.73 and 119,668.05
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Solution
The fourth proportional to 129,189.74, 178,269.73 and 119,668.05 is: 165,130.69
Step by Step Solution
- Step 1: Write the proportion equation
129,189.74 : 178,269.73 = 119,668.05 : x - Step 2: Convert to fraction form
129,189.74/178,269.73 = 119,668.05/x - Step 3: Cross multiply
129,189.74x = 178,269.73 × 119,668.05 - Step 4: Simplify right side
129,189.74x = 21,333,190,663.96 - Step 5: Solve for x
x = 21,333,190,663.96/129,189.74 - Step 6: Final answer
x = 165,130.69
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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.