Finding the Fourth Proportional to 129,216.09, 193,821.70 and 70,425.88
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Solution
The fourth proportional to 129,216.09, 193,821.70 and 70,425.88 is: 105,637.49
Step by Step Solution
- Step 1: Write the proportion equation
129,216.09 : 193,821.70 = 70,425.88 : x - Step 2: Convert to fraction form
129,216.09/193,821.70 = 70,425.88/x - Step 3: Cross multiply
129,216.09x = 193,821.70 × 70,425.88 - Step 4: Simplify right side
129,216.09x = 13,650,063,785.60 - Step 5: Solve for x
x = 13,650,063,785.60/129,216.09 - Step 6: Final answer
x = 105,637.49
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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.