Finding the Fourth Proportional to 128,462,733.12, 177,276,347.28 and 69,724,137.60
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Solution
The fourth proportional to 128,462,733.12, 177,276,347.28 and 69,724,137.60 is: 96,218,102.56
Step by Step Solution
- Step 1: Write the proportion equation
128,462,733.12 : 177,276,347.28 = 69,724,137.60 : x - Step 2: Convert to fraction form
128,462,733.12/177,276,347.28 = 69,724,137.60/x - Step 3: Cross multiply
128,462,733.12x = 177,276,347.28 × 69,724,137.60 - Step 4: Simplify right side
128,462,733.12x = 12,360,440,430,976,104 - Step 5: Solve for x
x = 12,360,440,430,976,104/128,462,733.12 - Step 6: Final answer
x = 96,218,102.56
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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.