Finding the Fourth Proportional to 129,806.20, 179,134.88 and 76,129.92
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Solution
The fourth proportional to 129,806.20, 179,134.88 and 76,129.92 is: 105,060.65
Step by Step Solution
- Step 1: Write the proportion equation
129,806.20 : 179,134.88 = 76,129.92 : x - Step 2: Convert to fraction form
129,806.20/179,134.88 = 76,129.92/x - Step 3: Cross multiply
129,806.20x = 179,134.88 × 76,129.92 - Step 4: Simplify right side
129,806.20x = 13,637,524,083.61 - Step 5: Solve for x
x = 13,637,524,083.61/129,806.20 - Step 6: Final answer
x = 105,060.65
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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.