Finding the Fourth Proportional to 129,279,680.78, 178,359,340.37 and 99,519,430.68
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Solution
The fourth proportional to 129,279,680.78, 178,359,340.37 and 99,519,430.68 is: 137,300,926.98
Step by Step Solution
- Step 1: Write the proportion equation
129,279,680.78 : 178,359,340.37 = 99,519,430.68 : x - Step 2: Convert to fraction form
129,279,680.78/178,359,340.37 = 99,519,430.68/x - Step 3: Cross multiply
129,279,680.78x = 178,359,340.37 × 99,519,430.68 - Step 4: Simplify right side
129,279,680.78x = 17,750,220,009,585,146 - Step 5: Solve for x
x = 17,750,220,009,585,146/129,279,680.78 - Step 6: Final answer
x = 137,300,926.98
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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.