Finding the Fourth Proportional to 128,079.06, 176,743.41 and 71,489.14
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Solution
The fourth proportional to 128,079.06, 176,743.41 and 71,489.14 is: 98,651.84
Step by Step Solution
- Step 1: Write the proportion equation
128,079.06 : 176,743.41 = 71,489.14 : x - Step 2: Convert to fraction form
128,079.06/176,743.41 = 71,489.14/x - Step 3: Cross multiply
128,079.06x = 176,743.41 × 71,489.14 - Step 4: Simplify right side
128,079.06x = 12,635,234,381.57 - Step 5: Solve for x
x = 12,635,234,381.57/128,079.06 - Step 6: Final answer
x = 98,651.84
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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.