Finding the Fourth Proportional to 138,456.80, 191,070.26 and 74,794.58
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Solution
The fourth proportional to 138,456.80, 191,070.26 and 74,794.58 is: 103,216.45
Step by Step Solution
- Step 1: Write the proportion equation
138,456.80 : 191,070.26 = 74,794.58 : x - Step 2: Convert to fraction form
138,456.80/191,070.26 = 74,794.58/x - Step 3: Cross multiply
138,456.80x = 191,070.26 × 74,794.58 - Step 4: Simplify right side
138,456.80x = 14,291,019,847.19 - Step 5: Solve for x
x = 14,291,019,847.19/138,456.80 - Step 6: Final answer
x = 103,216.45
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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.