Finding the Fourth Proportional to 138,105,257.08, 190,571,685.78 and 76,221,609.70
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Solution
The fourth proportional to 138,105,257.08, 190,571,685.78 and 76,221,609.70 is: 105,178,332.53
Step by Step Solution
- Step 1: Write the proportion equation
138,105,257.08 : 190,571,685.78 = 76,221,609.70 : x - Step 2: Convert to fraction form
138,105,257.08/190,571,685.78 = 76,221,609.70/x - Step 3: Cross multiply
138,105,257.08x = 190,571,685.78 × 76,221,609.70 - Step 4: Simplify right side
138,105,257.08x = 14,525,680,653,394,200 - Step 5: Solve for x
x = 14,525,680,653,394,200/138,105,257.08 - Step 6: Final answer
x = 105,178,332.53
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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.