Finding the Fourth Proportional to 128,624,661.84, 177,502,689.78 and 69,887,476.92
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Solution
The fourth proportional to 128,624,661.84, 177,502,689.78 and 69,887,476.92 is: 96,445,074.82
Step by Step Solution
- Step 1: Write the proportion equation
128,624,661.84 : 177,502,689.78 = 69,887,476.92 : x - Step 2: Convert to fraction form
128,624,661.84/177,502,689.78 = 69,887,476.92/x - Step 3: Cross multiply
128,624,661.84x = 177,502,689.78 × 69,887,476.92 - Step 4: Simplify right side
128,624,661.84x = 12,405,215,135,237,670 - Step 5: Solve for x
x = 12,405,215,135,237,670/128,624,661.84 - Step 6: Final answer
x = 96,445,074.82
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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.