Finding the Fourth Proportional to 189,701.21, 261,909.71 and 121,747.47
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Solution
The fourth proportional to 189,701.21, 261,909.71 and 121,747.47 is: 168,089.83
Step by Step Solution
- Step 1: Write the proportion equation
189,701.21 : 261,909.71 = 121,747.47 : x - Step 2: Convert to fraction form
189,701.21/261,909.71 = 121,747.47/x - Step 3: Cross multiply
189,701.21x = 261,909.71 × 121,747.47 - Step 4: Simplify right side
189,701.21x = 31,886,843,952.20 - Step 5: Solve for x
x = 31,886,843,952.20/189,701.21 - Step 6: Final answer
x = 168,089.83
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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.