Finding the Fourth Proportional to 138,618.24, 191,295.37 and 78,190.08
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Solution
The fourth proportional to 138,618.24, 191,295.37 and 78,190.08 is: 107,903.55
Step by Step Solution
- Step 1: Write the proportion equation
138,618.24 : 191,295.37 = 78,190.08 : x - Step 2: Convert to fraction form
138,618.24/191,295.37 = 78,190.08/x - Step 3: Cross multiply
138,618.24x = 191,295.37 × 78,190.08 - Step 4: Simplify right side
138,618.24x = 14,957,400,283.93 - Step 5: Solve for x
x = 14,957,400,283.93/138,618.24 - Step 6: Final answer
x = 107,903.55
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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.