Finding the Fourth Proportional to 81,209.12, 121,796.94 and 31,272.08
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Solution
The fourth proportional to 81,209.12, 121,796.94 and 31,272.08 is: 46,901.67
Step by Step Solution
- Step 1: Write the proportion equation
81,209.12 : 121,796.94 = 31,272.08 : x - Step 2: Convert to fraction form
81,209.12/121,796.94 = 31,272.08/x - Step 3: Cross multiply
81,209.12x = 121,796.94 × 31,272.08 - Step 4: Simplify right side
81,209.12x = 3,808,843,651.44 - Step 5: Solve for x
x = 3,808,843,651.44/81,209.12 - Step 6: Final answer
x = 46,901.67
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.