Finding the Fourth Proportional to 112,531.30, 155,349.65 and 86,979.98
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Solution
The fourth proportional to 112,531.30, 155,349.65 and 86,979.98 is: 120,076.02
Step by Step Solution
- Step 1: Write the proportion equation
112,531.30 : 155,349.65 = 86,979.98 : x - Step 2: Convert to fraction form
112,531.30/155,349.65 = 86,979.98/x - Step 3: Cross multiply
112,531.30x = 155,349.65 × 86,979.98 - Step 4: Simplify right side
112,531.30x = 13,512,310,055.83 - Step 5: Solve for x
x = 13,512,310,055.83/112,531.30 - Step 6: Final answer
x = 120,076.02
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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.