Finding the Fourth Proportional to 122,131.50, 168,623.74 and 76,260.99
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Solution
The fourth proportional to 122,131.50, 168,623.74 and 76,260.99 is: 105,291.55
Step by Step Solution
- Step 1: Write the proportion equation
122,131.50 : 168,623.74 = 76,260.99 : x - Step 2: Convert to fraction form
122,131.50/168,623.74 = 76,260.99/x - Step 3: Cross multiply
122,131.50x = 168,623.74 × 76,260.99 - Step 4: Simplify right side
122,131.50x = 12,859,414,077.57 - Step 5: Solve for x
x = 12,859,414,077.57/122,131.50 - Step 6: Final answer
x = 105,291.55
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.