Finding the Fourth Proportional to 129,162.85, 193,709.14 and 81,706.70
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Solution
The fourth proportional to 129,162.85, 193,709.14 and 81,706.70 is: 122,537.83
Step by Step Solution
- Step 1: Write the proportion equation
129,162.85 : 193,709.14 = 81,706.70 : x - Step 2: Convert to fraction form
129,162.85/193,709.14 = 81,706.70/x - Step 3: Cross multiply
129,162.85x = 193,709.14 × 81,706.70 - Step 4: Simplify right side
129,162.85x = 15,827,334,869.24 - Step 5: Solve for x
x = 15,827,334,869.24/129,162.85 - Step 6: Final answer
x = 122,537.83
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.