Finding the Fourth Proportional to 128,602,304.60, 177,486,394.74 and 76,391,546.54
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Solution
The fourth proportional to 128,602,304.60, 177,486,394.74 and 76,391,546.54 is: 105,429,371.78
Step by Step Solution
- Step 1: Write the proportion equation
128,602,304.60 : 177,486,394.74 = 76,391,546.54 : x - Step 2: Convert to fraction form
128,602,304.60/177,486,394.74 = 76,391,546.54/x - Step 3: Cross multiply
128,602,304.60x = 177,486,394.74 × 76,391,546.54 - Step 4: Simplify right side
128,602,304.60x = 13,558,460,183,997,524 - Step 5: Solve for x
x = 13,558,460,183,997,524/128,602,304.60 - Step 6: Final answer
x = 105,429,371.78
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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.