Finding the Fourth Proportional to 78,247.12, 107,971.10 and 46,409.80
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Solution
The fourth proportional to 78,247.12, 107,971.10 and 46,409.80 is: 64,039.64
Step by Step Solution
- Step 1: Write the proportion equation
78,247.12 : 107,971.10 = 46,409.80 : x - Step 2: Convert to fraction form
78,247.12/107,971.10 = 46,409.80/x - Step 3: Cross multiply
78,247.12x = 107,971.10 × 46,409.80 - Step 4: Simplify right side
78,247.12x = 5,010,917,156.78 - Step 5: Solve for x
x = 5,010,917,156.78/78,247.12 - Step 6: Final answer
x = 64,039.64
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1.5x scale
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.