Finding the Fourth Proportional to 128,446,377.49, 177,256,631.90 and 69,709,110.06
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Solution
The fourth proportional to 128,446,377.49, 177,256,631.90 and 69,709,110.06 is: 96,198,914.31
Step by Step Solution
- Step 1: Write the proportion equation
128,446,377.49 : 177,256,631.90 = 69,709,110.06 : x - Step 2: Convert to fraction form
128,446,377.49/177,256,631.90 = 69,709,110.06/x - Step 3: Cross multiply
128,446,377.49x = 177,256,631.90 × 69,709,110.06 - Step 4: Simplify right side
128,446,377.49x = 12,356,402,061,982,008 - Step 5: Solve for x
x = 12,356,402,061,982,008/128,446,377.49 - Step 6: Final answer
x = 96,198,914.31
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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.