Finding the Fourth Proportional to 76,831.13, 115,246.76 and 21,427.13
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Solution
The fourth proportional to 76,831.13, 115,246.76 and 21,427.13 is: 32,140.71
Step by Step Solution
- Step 1: Write the proportion equation
76,831.13 : 115,246.76 = 21,427.13 : x - Step 2: Convert to fraction form
76,831.13/115,246.76 = 21,427.13/x - Step 3: Cross multiply
76,831.13x = 115,246.76 × 21,427.13 - Step 4: Simplify right side
76,831.13x = 2,469,406,625.23 - Step 5: Solve for x
x = 2,469,406,625.23/76,831.13 - Step 6: Final answer
x = 32,140.71
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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.