Finding the Fourth Proportional to 81,670.11, 122,308.30 and 81,079.62
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Solution
The fourth proportional to 81,670.11, 122,308.30 and 81,079.62 is: 121,423.99
Step by Step Solution
- Step 1: Write the proportion equation
81,670.11 : 122,308.30 = 81,079.62 : x - Step 2: Convert to fraction form
81,670.11/122,308.30 = 81,079.62/x - Step 3: Cross multiply
81,670.11x = 122,308.30 × 81,079.62 - Step 4: Simplify right side
81,670.11x = 9,916,710,486.85 - Step 5: Solve for x
x = 9,916,710,486.85/81,670.11 - Step 6: Final answer
x = 121,423.99
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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.