Finding the Fourth Proportional to 121,212.70, 181,387.05 and 76,860.70
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Solution
The fourth proportional to 121,212.70, 181,387.05 and 76,860.70 is: 115,017.12
Step by Step Solution
- Step 1: Write the proportion equation
121,212.70 : 181,387.05 = 76,860.70 : x - Step 2: Convert to fraction form
121,212.70/181,387.05 = 76,860.70/x - Step 3: Cross multiply
121,212.70x = 181,387.05 × 76,860.70 - Step 4: Simplify right side
121,212.70x = 13,941,535,633.94 - Step 5: Solve for x
x = 13,941,535,633.94/121,212.70 - Step 6: Final answer
x = 115,017.12
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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.