Finding the Fourth Proportional to 149,261.30, 205,977.62 and 81,279.08
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Solution
The fourth proportional to 149,261.30, 205,977.62 and 81,279.08 is: 112,163.51
Step by Step Solution
- Step 1: Write the proportion equation
149,261.30 : 205,977.62 = 81,279.08 : x - Step 2: Convert to fraction form
149,261.30/205,977.62 = 81,279.08/x - Step 3: Cross multiply
149,261.30x = 205,977.62 × 81,279.08 - Step 4: Simplify right side
149,261.30x = 16,741,670,017.91 - Step 5: Solve for x
x = 16,741,670,017.91/149,261.30 - Step 6: Final answer
x = 112,163.51
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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.