Finding the Fourth Proportional to 129,201.96, 178,277.02 and 71,839.65
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Solution
The fourth proportional to 129,201.96, 178,277.02 and 71,839.65 is: 99,126.66
Step by Step Solution
- Step 1: Write the proportion equation
129,201.96 : 178,277.02 = 71,839.65 : x - Step 2: Convert to fraction form
129,201.96/178,277.02 = 71,839.65/x - Step 3: Cross multiply
129,201.96x = 178,277.02 × 71,839.65 - Step 4: Simplify right side
129,201.96x = 12,807,358,719.84 - Step 5: Solve for x
x = 12,807,358,719.84/129,201.96 - Step 6: Final answer
x = 99,126.66
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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.