Finding the Fourth Proportional to 81,407.73, 121,901.30 and 56,185.09
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Solution
The fourth proportional to 81,407.73, 121,901.30 and 56,185.09 is: 84,132.50
Step by Step Solution
- Step 1: Write the proportion equation
81,407.73 : 121,901.30 = 56,185.09 : x - Step 2: Convert to fraction form
81,407.73/121,901.30 = 56,185.09/x - Step 3: Cross multiply
81,407.73x = 121,901.30 × 56,185.09 - Step 4: Simplify right side
81,407.73x = 6,849,036,138.37 - Step 5: Solve for x
x = 6,849,036,138.37/81,407.73 - Step 6: Final answer
x = 84,132.50
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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.