Finding the Fourth Proportional to 81,731.84, 112,747.52 and 54,883.68
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Solution
The fourth proportional to 81,731.84, 112,747.52 and 54,883.68 is: 75,710.99
Step by Step Solution
- Step 1: Write the proportion equation
81,731.84 : 112,747.52 = 54,883.68 : x - Step 2: Convert to fraction form
81,731.84/112,747.52 = 54,883.68/x - Step 3: Cross multiply
81,731.84x = 112,747.52 × 54,883.68 - Step 4: Simplify right side
81,731.84x = 6,187,998,808.47 - Step 5: Solve for x
x = 6,187,998,808.47/81,731.84 - Step 6: Final answer
x = 75,710.99
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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.