Finding the Fourth Proportional to 138,215.08, 190,735.62 and 78,599.08
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Solution
The fourth proportional to 138,215.08, 190,735.62 and 78,599.08 is: 108,466.05
Step by Step Solution
- Step 1: Write the proportion equation
138,215.08 : 190,735.62 = 78,599.08 : x - Step 2: Convert to fraction form
138,215.08/190,735.62 = 78,599.08/x - Step 3: Cross multiply
138,215.08x = 190,735.62 × 78,599.08 - Step 4: Simplify right side
138,215.08x = 14,991,644,255.23 - Step 5: Solve for x
x = 14,991,644,255.23/138,215.08 - Step 6: Final answer
x = 108,466.05
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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.