Finding the Fourth Proportional to 81,239.24, 121,846.26 and 31,342.70
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Solution
The fourth proportional to 81,239.24, 121,846.26 and 31,342.70 is: 47,009.19
Step by Step Solution
- Step 1: Write the proportion equation
81,239.24 : 121,846.26 = 31,342.70 : x - Step 2: Convert to fraction form
81,239.24/121,846.26 = 31,342.70/x - Step 3: Cross multiply
81,239.24x = 121,846.26 × 31,342.70 - Step 4: Simplify right side
81,239.24x = 3,818,990,773.30 - Step 5: Solve for x
x = 3,818,990,773.30/81,239.24 - Step 6: Final answer
x = 47,009.19
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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.