Finding the Fourth Proportional to 128,158,843.92, 176,860,053.75 and 69,421,509.06
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Solution
The fourth proportional to 128,158,843.92, 176,860,053.75 and 69,421,509.06 is: 95,802,142.47
Step by Step Solution
- Step 1: Write the proportion equation
128,158,843.92 : 176,860,053.75 = 69,421,509.06 : x - Step 2: Convert to fraction form
128,158,843.92/176,860,053.75 = 69,421,509.06/x - Step 3: Cross multiply
128,158,843.92x = 176,860,053.75 × 69,421,509.06 - Step 4: Simplify right side
128,158,843.92x = 12,277,891,823,757,712 - Step 5: Solve for x
x = 12,277,891,823,757,712/128,158,843.92 - Step 6: Final answer
x = 95,802,142.47
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1.5x scale
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.