Finding the Fourth Proportional to 128,122.28, 176,805.06 and 71,532.44
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Solution
The fourth proportional to 128,122.28, 176,805.06 and 71,532.44 is: 98,712.71
Step by Step Solution
- Step 1: Write the proportion equation
128,122.28 : 176,805.06 = 71,532.44 : x - Step 2: Convert to fraction form
128,122.28/176,805.06 = 71,532.44/x - Step 3: Cross multiply
128,122.28x = 176,805.06 × 71,532.44 - Step 4: Simplify right side
128,122.28x = 12,647,297,346.15 - Step 5: Solve for x
x = 12,647,297,346.15/128,122.28 - Step 6: Final answer
x = 98,712.71
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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.