Finding the Fourth Proportional to 138,097.92, 190,573.44 and 78,478.08
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Solution
The fourth proportional to 138,097.92, 190,573.44 and 78,478.08 is: 108,298.79
Step by Step Solution
- Step 1: Write the proportion equation
138,097.92 : 190,573.44 = 78,478.08 : x - Step 2: Convert to fraction form
138,097.92/190,573.44 = 78,478.08/x - Step 3: Cross multiply
138,097.92x = 190,573.44 × 78,478.08 - Step 4: Simplify right side
138,097.92x = 14,955,837,670.20 - Step 5: Solve for x
x = 14,955,837,670.20/138,097.92 - Step 6: Final answer
x = 108,298.79
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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.