Finding the Fourth Proportional to 80,831.70, 121,247.55 and 74,999.70
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Solution
The fourth proportional to 80,831.70, 121,247.55 and 74,999.70 is: 112,499.55
Step by Step Solution
- Step 1: Write the proportion equation
80,831.70 : 121,247.55 = 74,999.70 : x - Step 2: Convert to fraction form
80,831.70/121,247.55 = 74,999.70/x - Step 3: Cross multiply
80,831.70x = 121,247.55 × 74,999.70 - Step 4: Simplify right side
80,831.70x = 9,093,529,875.74 - Step 5: Solve for x
x = 9,093,529,875.74/80,831.70 - Step 6: Final answer
x = 112,499.55
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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.