Finding the Fourth Proportional to 81,317.70, 121,976.55 and 68,195.70
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Solution
The fourth proportional to 81,317.70, 121,976.55 and 68,195.70 is: 102,293.55
Step by Step Solution
- Step 1: Write the proportion equation
81,317.70 : 121,976.55 = 68,195.70 : x - Step 2: Convert to fraction form
81,317.70/121,976.55 = 68,195.70/x - Step 3: Cross multiply
81,317.70x = 121,976.55 × 68,195.70 - Step 4: Simplify right side
81,317.70x = 8,318,276,210.84 - Step 5: Solve for x
x = 8,318,276,210.84/81,317.70 - Step 6: Final answer
x = 102,293.55
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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.