Finding the Fourth Proportional to 121,207.10, 181,810.65 and 74,486.30
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Solution
The fourth proportional to 121,207.10, 181,810.65 and 74,486.30 is: 111,729.45
Step by Step Solution
- Step 1: Write the proportion equation
121,207.10 : 181,810.65 = 74,486.30 : x - Step 2: Convert to fraction form
121,207.10/181,810.65 = 74,486.30/x - Step 3: Cross multiply
121,207.10x = 181,810.65 × 74,486.30 - Step 4: Simplify right side
121,207.10x = 13,542,402,619.10 - Step 5: Solve for x
x = 13,542,402,619.10/121,207.10 - Step 6: Final answer
x = 111,729.45
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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.