Finding the Fourth Proportional to 123,630.08, 170,536.40 and 78,918.08
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Solution
The fourth proportional to 123,630.08, 170,536.40 and 78,918.08 is: 108,860.28
Step by Step Solution
- Step 1: Write the proportion equation
123,630.08 : 170,536.40 = 78,918.08 : x - Step 2: Convert to fraction form
123,630.08/170,536.40 = 78,918.08/x - Step 3: Cross multiply
123,630.08x = 170,536.40 × 78,918.08 - Step 4: Simplify right side
123,630.08x = 13,458,404,010.84 - Step 5: Solve for x
x = 13,458,404,010.84/123,630.08 - Step 6: Final answer
x = 108,860.28
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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.