Finding the Fourth Proportional to 128,115.16, 176,799.30 and 71,528.68
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Solution
The fourth proportional to 128,115.16, 176,799.30 and 71,528.68 is: 98,709.79
Step by Step Solution
- Step 1: Write the proportion equation
128,115.16 : 176,799.30 = 71,528.68 : x - Step 2: Convert to fraction form
128,115.16/176,799.30 = 71,528.68/x - Step 3: Cross multiply
128,115.16x = 176,799.30 × 71,528.68 - Step 4: Simplify right side
128,115.16x = 12,646,220,553.92 - Step 5: Solve for x
x = 12,646,220,553.92/128,115.16 - Step 6: Final answer
x = 98,709.79
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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.