Finding the Fourth Proportional to 138,168.29, 190,670.68 and 77,739.05
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Solution
The fourth proportional to 138,168.29, 190,670.68 and 77,739.05 is: 107,279.01
Step by Step Solution
- Step 1: Write the proportion equation
138,168.29 : 190,670.68 = 77,739.05 : x - Step 2: Convert to fraction form
138,168.29/190,670.68 = 77,739.05/x - Step 3: Cross multiply
138,168.29x = 190,670.68 × 77,739.05 - Step 4: Simplify right side
138,168.29x = 14,822,557,526.05 - Step 5: Solve for x
x = 14,822,557,526.05/138,168.29 - Step 6: Final answer
x = 107,279.01
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1.5x scale
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.