Finding the Fourth Proportional to 128,634,721.79, 177,517,040.67 and 69,897,386.70
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Solution
The fourth proportional to 128,634,721.79, 177,517,040.67 and 69,897,386.70 is: 96,459,004.73
Step by Step Solution
- Step 1: Write the proportion equation
128,634,721.79 : 177,517,040.67 = 69,897,386.70 : x - Step 2: Convert to fraction form
128,634,721.79/177,517,040.67 = 69,897,386.70/x - Step 3: Cross multiply
128,634,721.79x = 177,517,040.67 × 69,897,386.70 - Step 4: Simplify right side
128,634,721.79x = 12,407,977,237,550,616 - Step 5: Solve for x
x = 12,407,977,237,550,616/128,634,721.79 - Step 6: Final answer
x = 96,459,004.73
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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.