Finding the Fourth Proportional to 128,343,010.68, 177,135,997.74 and 76,160,818.92
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Solution
The fourth proportional to 128,343,010.68, 177,135,997.74 and 76,160,818.92 is: 105,115,366.83
Step by Step Solution
- Step 1: Write the proportion equation
128,343,010.68 : 177,135,997.74 = 76,160,818.92 : x - Step 2: Convert to fraction form
128,343,010.68/177,135,997.74 = 76,160,818.92/x - Step 3: Cross multiply
128,343,010.68x = 177,135,997.74 × 76,160,818.92 - Step 4: Simplify right side
128,343,010.68x = 13,490,822,648,089,670 - Step 5: Solve for x
x = 13,490,822,648,089,670/128,343,010.68 - Step 6: Final answer
x = 105,115,366.83
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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.