Finding the Fourth Proportional to 128,705,321.40, 193,057,982.10 and 68,239,145.40
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Solution
The fourth proportional to 128,705,321.40, 193,057,982.10 and 68,239,145.40 is: 102,358,718.10
Step by Step Solution
- Step 1: Write the proportion equation
128,705,321.40 : 193,057,982.10 = 68,239,145.40 : x - Step 2: Convert to fraction form
128,705,321.40/193,057,982.10 = 68,239,145.40/x - Step 3: Cross multiply
128,705,321.40x = 193,057,982.10 × 68,239,145.40 - Step 4: Simplify right side
128,705,321.40x = 13,174,111,711,152,498 - Step 5: Solve for x
x = 13,174,111,711,152,498/128,705,321.40 - Step 6: Final answer
x = 102,358,718.10
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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.