Finding the Fourth Proportional to 102,553.36, 141,414.36 and 81,005.20
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Solution
The fourth proportional to 102,553.36, 141,414.36 and 81,005.20 is: 111,700.86
Step by Step Solution
- Step 1: Write the proportion equation
102,553.36 : 141,414.36 = 81,005.20 : x - Step 2: Convert to fraction form
102,553.36/141,414.36 = 81,005.20/x - Step 3: Cross multiply
102,553.36x = 141,414.36 × 81,005.20 - Step 4: Simplify right side
102,553.36x = 11,455,298,514.67 - Step 5: Solve for x
x = 11,455,298,514.67/102,553.36 - Step 6: Final answer
x = 111,700.86
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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.