Finding the Fourth Proportional to 139,741.36, 192,415.96 and 105,336.07
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Solution
The fourth proportional to 139,741.36, 192,415.96 and 105,336.07 is: 145,041.82
Step by Step Solution
- Step 1: Write the proportion equation
139,741.36 : 192,415.96 = 105,336.07 : x - Step 2: Convert to fraction form
139,741.36/192,415.96 = 105,336.07/x - Step 3: Cross multiply
139,741.36x = 192,415.96 × 105,336.07 - Step 4: Simplify right side
139,741.36x = 20,268,341,031.68 - Step 5: Solve for x
x = 20,268,341,031.68/139,741.36 - Step 6: Final answer
x = 145,041.82
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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.