Finding the Fourth Proportional to 138,672,281.80, 208,008,422.70 and 98,361,497.80
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Solution
The fourth proportional to 138,672,281.80, 208,008,422.70 and 98,361,497.80 is: 147,542,246.70
Step by Step Solution
- Step 1: Write the proportion equation
138,672,281.80 : 208,008,422.70 = 98,361,497.80 : x - Step 2: Convert to fraction form
138,672,281.80/208,008,422.70 = 98,361,497.80/x - Step 3: Cross multiply
138,672,281.80x = 208,008,422.70 × 98,361,497.80 - Step 4: Simplify right side
138,672,281.80x = 20,460,020,011,787,520 - Step 5: Solve for x
x = 20,460,020,011,787,520/138,672,281.80 - Step 6: Final answer
x = 147,542,246.70
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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.