Finding the Fourth Proportional to 133,212.64, 183,831.30 and 72,781.99
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Solution
The fourth proportional to 133,212.64, 183,831.30 and 72,781.99 is: 100,437.97
Step by Step Solution
- Step 1: Write the proportion equation
133,212.64 : 183,831.30 = 72,781.99 : x - Step 2: Convert to fraction form
133,212.64/183,831.30 = 72,781.99/x - Step 3: Cross multiply
133,212.64x = 183,831.30 × 72,781.99 - Step 4: Simplify right side
133,212.64x = 13,379,607,739.57 - Step 5: Solve for x
x = 13,379,607,739.57/133,212.64 - Step 6: Final answer
x = 100,437.97
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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.