Finding the Fourth Proportional to 128,754.98, 177,678.68 and 71,394.54
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Solution
The fourth proportional to 128,754.98, 177,678.68 and 71,394.54 is: 98,522.70
Step by Step Solution
- Step 1: Write the proportion equation
128,754.98 : 177,678.68 = 71,394.54 : x - Step 2: Convert to fraction form
128,754.98/177,678.68 = 71,394.54/x - Step 3: Cross multiply
128,754.98x = 177,678.68 × 71,394.54 - Step 4: Simplify right side
128,754.98x = 12,685,287,626.41 - Step 5: Solve for x
x = 12,685,287,626.41/128,754.98 - Step 6: Final answer
x = 98,522.70
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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.