Finding the Fourth Proportional to 128,748.92, 177,675.63 and 71,390.66
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Solution
The fourth proportional to 128,748.92, 177,675.63 and 71,390.66 is: 98,520.28
Step by Step Solution
- Step 1: Write the proportion equation
128,748.92 : 177,675.63 = 71,390.66 : x - Step 2: Convert to fraction form
128,748.92/177,675.63 = 71,390.66/x - Step 3: Cross multiply
128,748.92x = 177,675.63 × 71,390.66 - Step 4: Simplify right side
128,748.92x = 12,684,379,603.24 - Step 5: Solve for x
x = 12,684,379,603.24/128,748.92 - Step 6: Final answer
x = 98,520.28
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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.