Finding the Fourth Proportional to 142,152.75, 196,171.20 and 78,489.99
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Solution
The fourth proportional to 142,152.75, 196,171.20 and 78,489.99 is: 108,316.41
Step by Step Solution
- Step 1: Write the proportion equation
142,152.75 : 196,171.20 = 78,489.99 : x - Step 2: Convert to fraction form
142,152.75/196,171.20 = 78,489.99/x - Step 3: Cross multiply
142,152.75x = 196,171.20 × 78,489.99 - Step 4: Simplify right side
142,152.75x = 15,397,475,526.29 - Step 5: Solve for x
x = 15,397,475,526.29/142,152.75 - Step 6: Final answer
x = 108,316.41
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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.