Finding the Fourth Proportional to 128,261,637.90, 177,148,159.12 and 84,404,428.37
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Solution
The fourth proportional to 128,261,637.90, 177,148,159.12 and 84,404,428.37 is: 116,574,911.66
Step by Step Solution
- Step 1: Write the proportion equation
128,261,637.90 : 177,148,159.12 = 84,404,428.37 : x - Step 2: Convert to fraction form
128,261,637.90/177,148,159.12 = 84,404,428.37/x - Step 3: Cross multiply
128,261,637.90x = 177,148,159.12 × 84,404,428.37 - Step 4: Simplify right side
128,261,637.90x = 14,952,089,107,321,404 - Step 5: Solve for x
x = 14,952,089,107,321,404/128,261,637.90 - Step 6: Final answer
x = 116,574,911.66
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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.