Finding the Fourth Proportional to 120,163,637.70, 180,245,456.55 and 79,774,121.70
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Solution
The fourth proportional to 120,163,637.70, 180,245,456.55 and 79,774,121.70 is: 119,661,182.55
Step by Step Solution
- Step 1: Write the proportion equation
120,163,637.70 : 180,245,456.55 = 79,774,121.70 : x - Step 2: Convert to fraction form
120,163,637.70/180,245,456.55 = 79,774,121.70/x - Step 3: Cross multiply
120,163,637.70x = 180,245,456.55 × 79,774,121.70 - Step 4: Simplify right side
120,163,637.70x = 14,378,922,986,691,764 - Step 5: Solve for x
x = 14,378,922,986,691,764/120,163,637.70 - Step 6: Final answer
x = 119,661,182.55
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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.