Finding the Fourth Proportional to 129,329.20, 193,878.60 and 76,682.80
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Solution
The fourth proportional to 129,329.20, 193,878.60 and 76,682.80 is: 114,955.89
Step by Step Solution
- Step 1: Write the proportion equation
129,329.20 : 193,878.60 = 76,682.80 : x - Step 2: Convert to fraction form
129,329.20/193,878.60 = 76,682.80/x - Step 3: Cross multiply
129,329.20x = 193,878.60 × 76,682.80 - Step 4: Simplify right side
129,329.20x = 14,867,153,908.08 - Step 5: Solve for x
x = 14,867,153,908.08/129,329.20 - Step 6: Final answer
x = 114,955.89
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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.