Finding the Fourth Proportional to 129,310,688.70, 193,966,033.05 and 115,280,646.30
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Solution
The fourth proportional to 129,310,688.70, 193,966,033.05 and 115,280,646.30 is: 172,920,969.45
Step by Step Solution
- Step 1: Write the proportion equation
129,310,688.70 : 193,966,033.05 = 115,280,646.30 : x - Step 2: Convert to fraction form
129,310,688.70/193,966,033.05 = 115,280,646.30/x - Step 3: Cross multiply
129,310,688.70x = 193,966,033.05 × 115,280,646.30 - Step 4: Simplify right side
129,310,688.70x = 22,360,529,650,251,160 - Step 5: Solve for x
x = 22,360,529,650,251,160/129,310,688.70 - Step 6: Final answer
x = 172,920,969.45
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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.