Finding the Fourth Proportional to 149,431,930.59, 206,221,192.07 and 86,703,291.75
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Solution
The fourth proportional to 149,431,930.59, 206,221,192.07 and 86,703,291.75 is: 119,653,517.89
Step by Step Solution
- Step 1: Write the proportion equation
149,431,930.59 : 206,221,192.07 = 86,703,291.75 : x - Step 2: Convert to fraction form
149,431,930.59/206,221,192.07 = 86,703,291.75/x - Step 3: Cross multiply
149,431,930.59x = 206,221,192.07 × 86,703,291.75 - Step 4: Simplify right side
149,431,930.59x = 17,880,056,180,644,480 - Step 5: Solve for x
x = 17,880,056,180,644,480/149,431,930.59 - Step 6: Final answer
x = 119,653,517.89
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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.