Finding the Fourth Proportional to 128,617.57, 177,393.18 and 77,577.09
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Solution
The fourth proportional to 128,617.57, 177,393.18 and 77,577.09 is: 106,996.63
Step by Step Solution
- Step 1: Write the proportion equation
128,617.57 : 177,393.18 = 77,577.09 : x - Step 2: Convert to fraction form
128,617.57/177,393.18 = 77,577.09/x - Step 3: Cross multiply
128,617.57x = 177,393.18 × 77,577.09 - Step 4: Simplify right side
128,617.57x = 13,761,645,734.11 - Step 5: Solve for x
x = 13,761,645,734.11/128,617.57 - Step 6: Final answer
x = 106,996.63
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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.