Finding the Fourth Proportional to 99,779.45, 137,692.98 and 54,457.99
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Solution
The fourth proportional to 99,779.45, 137,692.98 and 54,457.99 is: 75,150.57
Step by Step Solution
- Step 1: Write the proportion equation
99,779.45 : 137,692.98 = 54,457.99 : x - Step 2: Convert to fraction form
99,779.45/137,692.98 = 54,457.99/x - Step 3: Cross multiply
99,779.45x = 137,692.98 × 54,457.99 - Step 4: Simplify right side
99,779.45x = 7,498,482,583.68 - Step 5: Solve for x
x = 7,498,482,583.68/99,779.45 - Step 6: Final answer
x = 75,150.57
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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.