Finding the Fourth Proportional to 99,431.13, 137,214.99 and 54,719.13
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Solution
The fourth proportional to 99,431.13, 137,214.99 and 54,719.13 is: 75,512.42
Step by Step Solution
- Step 1: Write the proportion equation
99,431.13 : 137,214.99 = 54,719.13 : x - Step 2: Convert to fraction form
99,431.13/137,214.99 = 54,719.13/x - Step 3: Cross multiply
99,431.13x = 137,214.99 × 54,719.13 - Step 4: Simplify right side
99,431.13x = 7,508,285,185.12 - Step 5: Solve for x
x = 7,508,285,185.12/99,431.13 - Step 6: Final answer
x = 75,512.42
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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.