Finding the Fourth Proportional to 129,176.13, 178,350.05 and 115,521.81
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Solution
The fourth proportional to 129,176.13, 178,350.05 and 115,521.81 is: 159,497.89
Step by Step Solution
- Step 1: Write the proportion equation
129,176.13 : 178,350.05 = 115,521.81 : x - Step 2: Convert to fraction form
129,176.13/178,350.05 = 115,521.81/x - Step 3: Cross multiply
129,176.13x = 178,350.05 × 115,521.81 - Step 4: Simplify right side
129,176.13x = 20,603,320,011.98 - Step 5: Solve for x
x = 20,603,320,011.98/129,176.13 - Step 6: Final answer
x = 159,497.89
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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.