Finding the Fourth Proportional to 138,536.35, 191,190.03 and 78,112.63
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Solution
The fourth proportional to 138,536.35, 191,190.03 and 78,112.63 is: 107,800.99
Step by Step Solution
- Step 1: Write the proportion equation
138,536.35 : 191,190.03 = 78,112.63 : x - Step 2: Convert to fraction form
138,536.35/191,190.03 = 78,112.63/x - Step 3: Cross multiply
138,536.35x = 191,190.03 × 78,112.63 - Step 4: Simplify right side
138,536.35x = 14,934,356,073.08 - Step 5: Solve for x
x = 14,934,356,073.08/138,536.35 - Step 6: Final answer
x = 107,800.99
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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.