Finding the Fourth Proportional to 129,083.19, 178,137.09 and 71,727.81
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Solution
The fourth proportional to 129,083.19, 178,137.09 and 71,727.81 is: 98,985.65
Step by Step Solution
- Step 1: Write the proportion equation
129,083.19 : 178,137.09 = 71,727.81 : x - Step 2: Convert to fraction form
129,083.19/178,137.09 = 71,727.81/x - Step 3: Cross multiply
129,083.19x = 178,137.09 × 71,727.81 - Step 4: Simplify right side
129,083.19x = 12,777,383,345.47 - Step 5: Solve for x
x = 12,777,383,345.47/129,083.19 - Step 6: Final answer
x = 98,985.65
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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.