Finding the Fourth Proportional to 138,211.32, 190,729.86 and 77,782.08
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Solution
The fourth proportional to 138,211.32, 190,729.86 and 77,782.08 is: 107,338.28
Step by Step Solution
- Step 1: Write the proportion equation
138,211.32 : 190,729.86 = 77,782.08 : x - Step 2: Convert to fraction form
138,211.32/190,729.86 = 77,782.08/x - Step 3: Cross multiply
138,211.32x = 190,729.86 × 77,782.08 - Step 4: Simplify right side
138,211.32x = 14,835,365,228.91 - Step 5: Solve for x
x = 14,835,365,228.91/138,211.32 - Step 6: Final answer
x = 107,338.28
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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.