Finding the Fourth Proportional to 138,615.70, 191,268.44 and 78,183.70
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Solution
The fourth proportional to 138,615.70, 191,268.44 and 78,183.70 is: 107,881.53
Step by Step Solution
- Step 1: Write the proportion equation
138,615.70 : 191,268.44 = 78,183.70 : x - Step 2: Convert to fraction form
138,615.70/191,268.44 = 78,183.70/x - Step 3: Cross multiply
138,615.70x = 191,268.44 × 78,183.70 - Step 4: Simplify right side
138,615.70x = 14,954,074,332.43 - Step 5: Solve for x
x = 14,954,074,332.43/138,615.70 - Step 6: Final answer
x = 107,881.53
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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.