Finding the Fourth Proportional to 128,007.79, 176,577.30 and 74,285.96
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Solution
The fourth proportional to 128,007.79, 176,577.30 and 74,285.96 is: 102,471.99
Step by Step Solution
- Step 1: Write the proportion equation
128,007.79 : 176,577.30 = 74,285.96 : x - Step 2: Convert to fraction form
128,007.79/176,577.30 = 74,285.96/x - Step 3: Cross multiply
128,007.79x = 176,577.30 × 74,285.96 - Step 4: Simplify right side
128,007.79x = 13,117,213,361.82 - Step 5: Solve for x
x = 13,117,213,361.82/128,007.79 - Step 6: Final answer
x = 102,471.99
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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.