Finding the Fourth Proportional to 128,158,821.61, 176,860,022.94 and 69,421,486.68
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Solution
The fourth proportional to 128,158,821.61, 176,860,022.94 and 69,421,486.68 is: 95,802,111.57
Step by Step Solution
- Step 1: Write the proportion equation
128,158,821.61 : 176,860,022.94 = 69,421,486.68 : x - Step 2: Convert to fraction form
128,158,821.61/176,860,022.94 = 69,421,486.68/x - Step 3: Cross multiply
128,158,821.61x = 176,860,022.94 × 69,421,486.68 - Step 4: Simplify right side
128,158,821.61x = 12,277,885,726,753,706 - Step 5: Solve for x
x = 12,277,885,726,753,706/128,158,821.61 - Step 6: Final answer
x = 95,802,111.57
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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.