Finding the Fourth Proportional to 128,343,347.07, 177,136,458.33 and 76,161,155.28
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Solution
The fourth proportional to 128,343,347.07, 177,136,458.33 and 76,161,155.28 is: 105,115,828.88
Step by Step Solution
- Step 1: Write the proportion equation
128,343,347.07 : 177,136,458.33 = 76,161,155.28 : x - Step 2: Convert to fraction form
128,343,347.07/177,136,458.33 = 76,161,155.28/x - Step 3: Cross multiply
128,343,347.07x = 177,136,458.33 × 76,161,155.28 - Step 4: Simplify right side
128,343,347.07x = 13,490,917,308,620,380 - Step 5: Solve for x
x = 13,490,917,308,620,380/128,343,347.07 - Step 6: Final answer
x = 105,115,828.88
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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.