Finding the Fourth Proportional to 81,305.60, 121,728.36 and 51,649.88
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Solution
The fourth proportional to 81,305.60, 121,728.36 and 51,649.88 is: 77,328.69
Step by Step Solution
- Step 1: Write the proportion equation
81,305.60 : 121,728.36 = 51,649.88 : x - Step 2: Convert to fraction form
81,305.60/121,728.36 = 51,649.88/x - Step 3: Cross multiply
81,305.60x = 121,728.36 × 51,649.88 - Step 4: Simplify right side
81,305.60x = 6,287,255,186.60 - Step 5: Solve for x
x = 6,287,255,186.60/81,305.60 - Step 6: Final answer
x = 77,328.69
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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.