Finding the Fourth Proportional to 138,668,292.96, 191,361,934.80 and 79,930,569.12
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Solution
The fourth proportional to 138,668,292.96, 191,361,934.80 and 79,930,569.12 is: 110,304,006.99
Step by Step Solution
- Step 1: Write the proportion equation
138,668,292.96 : 191,361,934.80 = 79,930,569.12 : x - Step 2: Convert to fraction form
138,668,292.96/191,361,934.80 = 79,930,569.12/x - Step 3: Cross multiply
138,668,292.96x = 191,361,934.80 × 79,930,569.12 - Step 4: Simplify right side
138,668,292.96x = 15,295,668,356,468,336 - Step 5: Solve for x
x = 15,295,668,356,468,336/138,668,292.96 - Step 6: Final answer
x = 110,304,006.99
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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.