Finding the Fourth Proportional to 81,909.70, 113,008.10 and 66,776.26
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Solution
The fourth proportional to 81,909.70, 113,008.10 and 66,776.26 is: 92,128.99
Step by Step Solution
- Step 1: Write the proportion equation
81,909.70 : 113,008.10 = 66,776.26 : x - Step 2: Convert to fraction form
81,909.70/113,008.10 = 66,776.26/x - Step 3: Cross multiply
81,909.70x = 113,008.10 × 66,776.26 - Step 4: Simplify right side
81,909.70x = 7,546,258,267.71 - Step 5: Solve for x
x = 7,546,258,267.71/81,909.70 - Step 6: Final answer
x = 92,128.99
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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.