Finding the Fourth Proportional to 99,780.45, 137,694.36 and 54,458.99
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Solution
The fourth proportional to 99,780.45, 137,694.36 and 54,458.99 is: 75,151.95
Step by Step Solution
- Step 1: Write the proportion equation
99,780.45 : 137,694.36 = 54,458.99 : x - Step 2: Convert to fraction form
99,780.45/137,694.36 = 54,458.99/x - Step 3: Cross multiply
99,780.45x = 137,694.36 × 54,458.99 - Step 4: Simplify right side
99,780.45x = 7,498,695,774.30 - Step 5: Solve for x
x = 7,498,695,774.30/99,780.45 - Step 6: Final answer
x = 75,151.95
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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.