Finding the Fourth Proportional to 86,517.30, 129,812.40 and 47,102.70
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Solution
The fourth proportional to 86,517.30, 129,812.40 and 47,102.70 is: 70,673.89
Step by Step Solution
- Step 1: Write the proportion equation
86,517.30 : 129,812.40 = 47,102.70 : x - Step 2: Convert to fraction form
86,517.30/129,812.40 = 47,102.70/x - Step 3: Cross multiply
86,517.30x = 129,812.40 × 47,102.70 - Step 4: Simplify right side
86,517.30x = 6,114,514,533.48 - Step 5: Solve for x
x = 6,114,514,533.48/86,517.30 - Step 6: Final answer
x = 70,673.89
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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.