Finding the Fourth Proportional to 128,832.44, 177,790.60 and 77,838.08
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Solution
The fourth proportional to 128,832.44, 177,790.60 and 77,838.08 is: 107,417.66
Step by Step Solution
- Step 1: Write the proportion equation
128,832.44 : 177,790.60 = 77,838.08 : x - Step 2: Convert to fraction form
128,832.44/177,790.60 = 77,838.08/x - Step 3: Cross multiply
128,832.44x = 177,790.60 × 77,838.08 - Step 4: Simplify right side
128,832.44x = 13,838,878,946.05 - Step 5: Solve for x
x = 13,838,878,946.05/128,832.44 - Step 6: Final answer
x = 107,417.66
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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.