Finding the Fourth Proportional to 118,369.30, 163,138.40 and 89,620.08
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Solution
The fourth proportional to 118,369.30, 163,138.40 and 89,620.08 is: 123,515.78
Step by Step Solution
- Step 1: Write the proportion equation
118,369.30 : 163,138.40 = 89,620.08 : x - Step 2: Convert to fraction form
118,369.30/163,138.40 = 89,620.08/x - Step 3: Cross multiply
118,369.30x = 163,138.40 × 89,620.08 - Step 4: Simplify right side
118,369.30x = 14,620,476,459.07 - Step 5: Solve for x
x = 14,620,476,459.07/118,369.30 - Step 6: Final answer
x = 123,515.78
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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.