Finding the Fourth Proportional to 129,424.69, 178,630.84 and 78,465.19
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Solution
The fourth proportional to 129,424.69, 178,630.84 and 78,465.19 is: 108,296.98
Step by Step Solution
- Step 1: Write the proportion equation
129,424.69 : 178,630.84 = 78,465.19 : x - Step 2: Convert to fraction form
129,424.69/178,630.84 = 78,465.19/x - Step 3: Cross multiply
129,424.69x = 178,630.84 × 78,465.19 - Step 4: Simplify right side
129,424.69x = 14,016,302,408.13 - Step 5: Solve for x
x = 14,016,302,408.13/129,424.69 - Step 6: Final answer
x = 108,296.98
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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.