Finding the Fourth Proportional to 81,274.36, 121,879.14 and 31,326.76
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Solution
The fourth proportional to 81,274.36, 121,879.14 and 31,326.76 is: 46,977.65
Step by Step Solution
- Step 1: Write the proportion equation
81,274.36 : 121,879.14 = 31,326.76 : x - Step 2: Convert to fraction form
81,274.36/121,879.14 = 31,326.76/x - Step 3: Cross multiply
81,274.36x = 121,879.14 × 31,326.76 - Step 4: Simplify right side
81,274.36x = 3,818,078,567.79 - Step 5: Solve for x
x = 3,818,078,567.79/81,274.36 - Step 6: Final answer
x = 46,977.65
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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.