Finding the Fourth Proportional to 88,172.64, 121,689.36 and 54,643.68
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Solution
The fourth proportional to 88,172.64, 121,689.36 and 54,643.68 is: 75,415.17
Step by Step Solution
- Step 1: Write the proportion equation
88,172.64 : 121,689.36 = 54,643.68 : x - Step 2: Convert to fraction form
88,172.64/121,689.36 = 54,643.68/x - Step 3: Cross multiply
88,172.64x = 121,689.36 × 54,643.68 - Step 4: Simplify right side
88,172.64x = 6,649,554,447.24 - Step 5: Solve for x
x = 6,649,554,447.24/88,172.64 - Step 6: Final answer
x = 75,415.17
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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.