Finding the Fourth Proportional to 129,218.70, 193,536.45 and 76,730.70
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Solution
The fourth proportional to 129,218.70, 193,536.45 and 76,730.70 is: 114,922.90
Step by Step Solution
- Step 1: Write the proportion equation
129,218.70 : 193,536.45 = 76,730.70 : x - Step 2: Convert to fraction form
129,218.70/193,536.45 = 76,730.70/x - Step 3: Cross multiply
129,218.70x = 193,536.45 × 76,730.70 - Step 4: Simplify right side
129,218.70x = 14,850,187,284.02 - Step 5: Solve for x
x = 14,850,187,284.02/129,218.70 - Step 6: Final answer
x = 114,922.90
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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.