Finding the Fourth Proportional to 129,052.80, 178,087.36 and 75,340.80
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Solution
The fourth proportional to 129,052.80, 178,087.36 and 75,340.80 is: 103,967.09
Step by Step Solution
- Step 1: Write the proportion equation
129,052.80 : 178,087.36 = 75,340.80 : x - Step 2: Convert to fraction form
129,052.80/178,087.36 = 75,340.80/x - Step 3: Cross multiply
129,052.80x = 178,087.36 × 75,340.80 - Step 4: Simplify right side
129,052.80x = 13,417,244,172.29 - Step 5: Solve for x
x = 13,417,244,172.29/129,052.80 - Step 6: Final answer
x = 103,967.09
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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.