Finding the Fourth Proportional to 129,106.36, 178,166.88 and 72,517.78
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Solution
The fourth proportional to 129,106.36, 178,166.88 and 72,517.78 is: 100,074.59
Step by Step Solution
- Step 1: Write the proportion equation
129,106.36 : 178,166.88 = 72,517.78 : x - Step 2: Convert to fraction form
129,106.36/178,166.88 = 72,517.78/x - Step 3: Cross multiply
129,106.36x = 178,166.88 × 72,517.78 - Step 4: Simplify right side
129,106.36x = 12,920,266,607.13 - Step 5: Solve for x
x = 12,920,266,607.13/129,106.36 - Step 6: Final answer
x = 100,074.59
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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.