Finding the Fourth Proportional to 81,409.11, 121,903.36 and 56,186.48
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Solution
The fourth proportional to 81,409.11, 121,903.36 and 56,186.48 is: 84,134.57
Step by Step Solution
- Step 1: Write the proportion equation
81,409.11 : 121,903.36 = 56,186.48 : x - Step 2: Convert to fraction form
81,409.11/121,903.36 = 56,186.48/x - Step 3: Cross multiply
81,409.11x = 121,903.36 × 56,186.48 - Step 4: Simplify right side
81,409.11x = 6,849,320,089.06 - Step 5: Solve for x
x = 6,849,320,089.06/81,409.11 - Step 6: Final answer
x = 84,134.57
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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.