Finding the Fourth Proportional to 128,967,392.50, 177,970,326.31 and 78,815,515.23
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Solution
The fourth proportional to 128,967,392.50, 177,970,326.31 and 78,815,515.23 is: 108,762,553.79
Step by Step Solution
- Step 1: Write the proportion equation
128,967,392.50 : 177,970,326.31 = 78,815,515.23 : x - Step 2: Convert to fraction form
128,967,392.50/177,970,326.31 = 78,815,515.23/x - Step 3: Cross multiply
128,967,392.50x = 177,970,326.31 × 78,815,515.23 - Step 4: Simplify right side
128,967,392.50x = 14,026,822,964,299,192 - Step 5: Solve for x
x = 14,026,822,964,299,192/128,967,392.50 - Step 6: Final answer
x = 108,762,553.79
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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.