Finding the Fourth Proportional to 99,686.11, 137,574.99 and 56,679.09
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Solution
The fourth proportional to 99,686.11, 137,574.99 and 56,679.09 is: 78,221.79
Step by Step Solution
- Step 1: Write the proportion equation
99,686.11 : 137,574.99 = 56,679.09 : x - Step 2: Convert to fraction form
99,686.11/137,574.99 = 56,679.09/x - Step 3: Cross multiply
99,686.11x = 137,574.99 × 56,679.09 - Step 4: Simplify right side
99,686.11x = 7,797,625,497.91 - Step 5: Solve for x
x = 7,797,625,497.91/99,686.11 - Step 6: Final answer
x = 78,221.79
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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.