Finding the Fourth Proportional to 138,287,671.68, 190,836,595.17 and 76,407,569.40
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Solution
The fourth proportional to 138,287,671.68, 190,836,595.17 and 76,407,569.40 is: 105,442,229.32
Step by Step Solution
- Step 1: Write the proportion equation
138,287,671.68 : 190,836,595.17 = 76,407,569.40 : x - Step 2: Convert to fraction form
138,287,671.68/190,836,595.17 = 76,407,569.40/x - Step 3: Cross multiply
138,287,671.68x = 190,836,595.17 × 76,407,569.40 - Step 4: Simplify right side
138,287,671.68x = 14,581,360,389,511,480 - Step 5: Solve for x
x = 14,581,360,389,511,480/138,287,671.68 - Step 6: Final answer
x = 105,442,229.32
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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.