Finding the Fourth Proportional to 128,813.47, 177,765.43 and 71,450.92
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Solution
The fourth proportional to 128,813.47, 177,765.43 and 71,450.92 is: 98,603.85
Step by Step Solution
- Step 1: Write the proportion equation
128,813.47 : 177,765.43 = 71,450.92 : x - Step 2: Convert to fraction form
128,813.47/177,765.43 = 71,450.92/x - Step 3: Cross multiply
128,813.47x = 177,765.43 × 71,450.92 - Step 4: Simplify right side
128,813.47x = 12,701,503,829.22 - Step 5: Solve for x
x = 12,701,503,829.22/128,813.47 - Step 6: Final answer
x = 98,603.85
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1.5x scale
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.