Finding the Fourth Proportional to 84,421.69, 126,651.26 and 31,831.63
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Solution
The fourth proportional to 84,421.69, 126,651.26 and 31,831.63 is: 47,754.50
Step by Step Solution
- Step 1: Write the proportion equation
84,421.69 : 126,651.26 = 31,831.63 : x - Step 2: Convert to fraction form
84,421.69/126,651.26 = 31,831.63/x - Step 3: Cross multiply
84,421.69x = 126,651.26 × 31,831.63 - Step 4: Simplify right side
84,421.69x = 4,031,515,888.20 - Step 5: Solve for x
x = 4,031,515,888.20/84,421.69 - Step 6: Final answer
x = 47,754.50
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1.5x scale
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.