Finding the Fourth Proportional to 128,236.50, 176,961.11 and 74,521.08
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Solution
The fourth proportional to 128,236.50, 176,961.11 and 74,521.08 is: 102,836.03
Step by Step Solution
- Step 1: Write the proportion equation
128,236.50 : 176,961.11 = 74,521.08 : x - Step 2: Convert to fraction form
128,236.50/176,961.11 = 74,521.08/x - Step 3: Cross multiply
128,236.50x = 176,961.11 × 74,521.08 - Step 4: Simplify right side
128,236.50x = 13,187,332,662.59 - Step 5: Solve for x
x = 13,187,332,662.59/128,236.50 - Step 6: Final answer
x = 102,836.03
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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.