Finding the Fourth Proportional to 81,623.70, 122,435.55 and 68,501.70
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Solution
The fourth proportional to 81,623.70, 122,435.55 and 68,501.70 is: 102,752.55
Step by Step Solution
- Step 1: Write the proportion equation
81,623.70 : 122,435.55 = 68,501.70 : x - Step 2: Convert to fraction form
81,623.70/122,435.55 = 68,501.70/x - Step 3: Cross multiply
81,623.70x = 122,435.55 × 68,501.70 - Step 4: Simplify right side
81,623.70x = 8,387,043,315.44 - Step 5: Solve for x
x = 8,387,043,315.44/81,623.70 - Step 6: Final answer
x = 102,752.55
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1.5x scale
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.