Finding the Fourth Proportional to 77,692.12, 107,621.18 and 76,117.48
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Solution
The fourth proportional to 77,692.12, 107,621.18 and 76,117.48 is: 105,439.95
Step by Step Solution
- Step 1: Write the proportion equation
77,692.12 : 107,621.18 = 76,117.48 : x - Step 2: Convert to fraction form
77,692.12/107,621.18 = 76,117.48/x - Step 3: Cross multiply
77,692.12x = 107,621.18 × 76,117.48 - Step 4: Simplify right side
77,692.12x = 8,191,853,016.23 - Step 5: Solve for x
x = 8,191,853,016.23/77,692.12 - Step 6: Final answer
x = 105,439.95
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Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.