Finding the Fourth Proportional to 128,982,465.14, 177,788,342.46 and 87,153,465.74
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Solution
The fourth proportional to 128,982,465.14, 177,788,342.46 and 87,153,465.74 is: 120,131,602.36
Step by Step Solution
- Step 1: Write the proportion equation
128,982,465.14 : 177,788,342.46 = 87,153,465.74 : x - Step 2: Convert to fraction form
128,982,465.14/177,788,342.46 = 87,153,465.74/x - Step 3: Cross multiply
128,982,465.14x = 177,788,342.46 × 87,153,465.74 - Step 4: Simplify right side
128,982,465.14x = 15,494,870,213,558,998 - Step 5: Solve for x
x = 15,494,870,213,558,998/128,982,465.14 - Step 6: Final answer
x = 120,131,602.36
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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.