Finding the Fourth Proportional to 139,993.14, 193,193.58 and 76,331.19
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Solution
The fourth proportional to 139,993.14, 193,193.58 and 76,331.19 is: 105,338.70
Step by Step Solution
- Step 1: Write the proportion equation
139,993.14 : 193,193.58 = 76,331.19 : x - Step 2: Convert to fraction form
139,993.14/193,193.58 = 76,331.19/x - Step 3: Cross multiply
139,993.14x = 193,193.58 × 76,331.19 - Step 4: Simplify right side
139,993.14x = 14,746,695,861.76 - Step 5: Solve for x
x = 14,746,695,861.76/139,993.14 - Step 6: Final answer
x = 105,338.70
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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.