Finding the Fourth Proportional to 86,279.15, 129,440.18 and 68,576.60
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Solution
The fourth proportional to 86,279.15, 129,440.18 and 68,576.60 is: 102,881.95
Step by Step Solution
- Step 1: Write the proportion equation
86,279.15 : 129,440.18 = 68,576.60 : x - Step 2: Convert to fraction form
86,279.15/129,440.18 = 68,576.60/x - Step 3: Cross multiply
86,279.15x = 129,440.18 × 68,576.60 - Step 4: Simplify right side
86,279.15x = 8,876,566,972.03 - Step 5: Solve for x
x = 8,876,566,972.03/86,279.15 - Step 6: Final answer
x = 102,881.95
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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.