Finding the Fourth Proportional to 81,472.20, 122,208.30 and 74,473.80
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Solution
The fourth proportional to 81,472.20, 122,208.30 and 74,473.80 is: 111,710.70
Step by Step Solution
- Step 1: Write the proportion equation
81,472.20 : 122,208.30 = 74,473.80 : x - Step 2: Convert to fraction form
81,472.20/122,208.30 = 74,473.80/x - Step 3: Cross multiply
81,472.20x = 122,208.30 × 74,473.80 - Step 4: Simplify right side
81,472.20x = 9,101,316,492.54 - Step 5: Solve for x
x = 9,101,316,492.54/81,472.20 - Step 6: Final answer
x = 111,710.70
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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.