Finding the Fourth Proportional to 128,705,342.40, 193,058,013.60 and 68,239,166.40
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Solution
The fourth proportional to 128,705,342.40, 193,058,013.60 and 68,239,166.40 is: 102,358,749.60
Step by Step Solution
- Step 1: Write the proportion equation
128,705,342.40 : 193,058,013.60 = 68,239,166.40 : x - Step 2: Convert to fraction form
128,705,342.40/193,058,013.60 = 68,239,166.40/x - Step 3: Cross multiply
128,705,342.40x = 193,058,013.60 × 68,239,166.40 - Step 4: Simplify right side
128,705,342.40x = 13,174,117,914,903,864 - Step 5: Solve for x
x = 13,174,117,914,903,864/128,705,342.40 - Step 6: Final answer
x = 102,358,749.60
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.