Finding the Fourth Proportional to 128,664.64, 177,557.62 and 71,304.90
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Solution
The fourth proportional to 128,664.64, 177,557.62 and 71,304.90 is: 98,400.99
Step by Step Solution
- Step 1: Write the proportion equation
128,664.64 : 177,557.62 = 71,304.90 : x - Step 2: Convert to fraction form
128,664.64/177,557.62 = 71,304.90/x - Step 3: Cross multiply
128,664.64x = 177,557.62 × 71,304.90 - Step 4: Simplify right side
128,664.64x = 12,660,728,338.34 - Step 5: Solve for x
x = 12,660,728,338.34/128,664.64 - Step 6: Final answer
x = 98,400.99
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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.