Finding the Fourth Proportional to 121,221.68, 181,771.71 and 70,637.09
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Solution
The fourth proportional to 121,221.68, 181,771.71 and 70,637.09 is: 105,920.20
Step by Step Solution
- Step 1: Write the proportion equation
121,221.68 : 181,771.71 = 70,637.09 : x - Step 2: Convert to fraction form
121,221.68/181,771.71 = 70,637.09/x - Step 3: Cross multiply
121,221.68x = 181,771.71 × 70,637.09 - Step 4: Simplify right side
121,221.68x = 12,839,824,638.72 - Step 5: Solve for x
x = 12,839,824,638.72/121,221.68 - Step 6: Final answer
x = 105,920.20
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.