Finding the Fourth Proportional to 81,929.80, 122,894.70 and 73,619.20
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Solution
The fourth proportional to 81,929.80, 122,894.70 and 73,619.20 is: 110,428.80
Step by Step Solution
- Step 1: Write the proportion equation
81,929.80 : 122,894.70 = 73,619.20 : x - Step 2: Convert to fraction form
81,929.80/122,894.70 = 73,619.20/x - Step 3: Cross multiply
81,929.80x = 122,894.70 × 73,619.20 - Step 4: Simplify right side
81,929.80x = 9,047,409,498.24 - Step 5: Solve for x
x = 9,047,409,498.24/81,929.80 - Step 6: Final answer
x = 110,428.80
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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.