Finding the Fourth Proportional to 128,135.97, 176,826.99 and 71,547.36
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Solution
The fourth proportional to 128,135.97, 176,826.99 and 71,547.36 is: 98,734.99
Step by Step Solution
- Step 1: Write the proportion equation
128,135.97 : 176,826.99 = 71,547.36 : x - Step 2: Convert to fraction form
128,135.97/176,826.99 = 71,547.36/x - Step 3: Cross multiply
128,135.97x = 176,826.99 × 71,547.36 - Step 4: Simplify right side
128,135.97x = 12,651,504,311.25 - Step 5: Solve for x
x = 12,651,504,311.25/128,135.97 - Step 6: Final answer
x = 98,734.99
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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.