Finding the Fourth Proportional to 128,149,623.48, 176,846,486.32 and 69,412,288.51
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Solution
The fourth proportional to 128,149,623.48, 176,846,486.32 and 69,412,288.51 is: 95,788,961.35
Step by Step Solution
- Step 1: Write the proportion equation
128,149,623.48 : 176,846,486.32 = 69,412,288.51 : x - Step 2: Convert to fraction form
128,149,623.48/176,846,486.32 = 69,412,288.51/x - Step 3: Cross multiply
128,149,623.48x = 176,846,486.32 × 69,412,288.51 - Step 4: Simplify right side
128,149,623.48x = 12,275,319,330,731,432 - Step 5: Solve for x
x = 12,275,319,330,731,432/128,149,623.48 - Step 6: Final answer
x = 95,788,961.35
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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.