Finding the Fourth Proportional to 78,130.36, 107,812.18 and 43,668.73
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Solution
The fourth proportional to 78,130.36, 107,812.18 and 43,668.73 is: 60,258.53
Step by Step Solution
- Step 1: Write the proportion equation
78,130.36 : 107,812.18 = 43,668.73 : x - Step 2: Convert to fraction form
78,130.36/107,812.18 = 43,668.73/x - Step 3: Cross multiply
78,130.36x = 107,812.18 × 43,668.73 - Step 4: Simplify right side
78,130.36x = 4,708,020,979.13 - Step 5: Solve for x
x = 4,708,020,979.13/78,130.36 - Step 6: Final answer
x = 60,258.53
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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.