Finding the Fourth Proportional to 138,058.08, 190,519.20 and 78,442.08
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Solution
The fourth proportional to 138,058.08, 190,519.20 and 78,442.08 is: 108,249.53
Step by Step Solution
- Step 1: Write the proportion equation
138,058.08 : 190,519.20 = 78,442.08 : x - Step 2: Convert to fraction form
138,058.08/190,519.20 = 78,442.08/x - Step 3: Cross multiply
138,058.08x = 190,519.20 × 78,442.08 - Step 4: Simplify right side
138,058.08x = 14,944,722,327.94 - Step 5: Solve for x
x = 14,944,722,327.94/138,058.08 - Step 6: Final answer
x = 108,249.53
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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.