Finding the Fourth Proportional to 128,682.74, 177,577.88 and 71,319.62
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Solution
The fourth proportional to 128,682.74, 177,577.88 and 71,319.62 is: 98,418.69
Step by Step Solution
- Step 1: Write the proportion equation
128,682.74 : 177,577.88 = 71,319.62 : x - Step 2: Convert to fraction form
128,682.74/177,577.88 = 71,319.62/x - Step 3: Cross multiply
128,682.74x = 177,577.88 × 71,319.62 - Step 4: Simplify right side
128,682.74x = 12,664,786,922.01 - Step 5: Solve for x
x = 12,664,786,922.01/128,682.74 - Step 6: Final answer
x = 98,418.69
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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.