Finding the Fourth Proportional to 129,176.13, 178,269.12 and 71,816.39
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Solution
The fourth proportional to 129,176.13, 178,269.12 and 71,816.39 is: 99,109.99
Step by Step Solution
- Step 1: Write the proportion equation
129,176.13 : 178,269.12 = 71,816.39 : x - Step 2: Convert to fraction form
129,176.13/178,269.12 = 71,816.39/x - Step 3: Cross multiply
129,176.13x = 178,269.12 × 71,816.39 - Step 4: Simplify right side
129,176.13x = 12,802,644,424.04 - Step 5: Solve for x
x = 12,802,644,424.04/129,176.13 - Step 6: Final answer
x = 99,109.99
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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.