Finding the Fourth Proportional to 111,987.14, 154,542.26 and 61,686.14
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Solution
The fourth proportional to 111,987.14, 154,542.26 and 61,686.14 is: 85,126.88
Step by Step Solution
- Step 1: Write the proportion equation
111,987.14 : 154,542.26 = 61,686.14 : x - Step 2: Convert to fraction form
111,987.14/154,542.26 = 61,686.14/x - Step 3: Cross multiply
111,987.14x = 154,542.26 × 61,686.14 - Step 4: Simplify right side
111,987.14x = 9,533,115,737.08 - Step 5: Solve for x
x = 9,533,115,737.08/111,987.14 - Step 6: Final answer
x = 85,126.88
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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.