Finding the Fourth Proportional to 128,926.88, 193,257.27 and 54,090.47
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Solution
The fourth proportional to 128,926.88, 193,257.27 and 54,090.47 is: 81,079.88
Step by Step Solution
- Step 1: Write the proportion equation
128,926.88 : 193,257.27 = 54,090.47 : x - Step 2: Convert to fraction form
128,926.88/193,257.27 = 54,090.47/x - Step 3: Cross multiply
128,926.88x = 193,257.27 × 54,090.47 - Step 4: Simplify right side
128,926.88x = 10,453,376,565.22 - Step 5: Solve for x
x = 10,453,376,565.22/128,926.88 - Step 6: Final answer
x = 81,079.88
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.