Finding the Fourth Proportional to 75,861.21, 113,861.88 and 71,283.76
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Solution
The fourth proportional to 75,861.21, 113,861.88 and 71,283.76 is: 106,991.47
Step by Step Solution
- Step 1: Write the proportion equation
75,861.21 : 113,861.88 = 71,283.76 : x - Step 2: Convert to fraction form
75,861.21/113,861.88 = 71,283.76/x - Step 3: Cross multiply
75,861.21x = 113,861.88 × 71,283.76 - Step 4: Simplify right side
75,861.21x = 8,116,502,642.41 - Step 5: Solve for x
x = 8,116,502,642.41/75,861.21 - Step 6: Final answer
x = 106,991.47
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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.