Finding the Fourth Proportional to 129,706.11, 178,992.05 and 73,117.53
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Solution
The fourth proportional to 129,706.11, 178,992.05 and 73,117.53 is: 100,900.85
Step by Step Solution
- Step 1: Write the proportion equation
129,706.11 : 178,992.05 = 73,117.53 : x - Step 2: Convert to fraction form
129,706.11/178,992.05 = 73,117.53/x - Step 3: Cross multiply
129,706.11x = 178,992.05 × 73,117.53 - Step 4: Simplify right side
129,706.11x = 13,087,456,220.05 - Step 5: Solve for x
x = 13,087,456,220.05/129,706.11 - Step 6: Final answer
x = 100,900.85
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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.