Finding the Fourth Proportional to 128,355.93, 177,076.94 and 85,928.13
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Solution
The fourth proportional to 128,355.93, 177,076.94 and 85,928.13 is: 118,544.50
Step by Step Solution
- Step 1: Write the proportion equation
128,355.93 : 177,076.94 = 85,928.13 : x - Step 2: Convert to fraction form
128,355.93/177,076.94 = 85,928.13/x - Step 3: Cross multiply
128,355.93x = 177,076.94 × 85,928.13 - Step 4: Simplify right side
128,355.93x = 15,215,889,005.30 - Step 5: Solve for x
x = 15,215,889,005.30/128,355.93 - Step 6: Final answer
x = 118,544.50
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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.