Finding the Fourth Proportional to 129,257.40, 193,885.74 and 40,511.28
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Solution
The fourth proportional to 129,257.40, 193,885.74 and 40,511.28 is: 60,766.81
Step by Step Solution
- Step 1: Write the proportion equation
129,257.40 : 193,885.74 = 40,511.28 : x - Step 2: Convert to fraction form
129,257.40/193,885.74 = 40,511.28/x - Step 3: Cross multiply
129,257.40x = 193,885.74 × 40,511.28 - Step 4: Simplify right side
129,257.40x = 7,854,559,501.15 - Step 5: Solve for x
x = 7,854,559,501.15/129,257.40 - Step 6: Final answer
x = 60,766.81
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.