Finding the Fourth Proportional to 128,158,824.36, 176,860,026.76 and 69,421,489.44
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Solution
The fourth proportional to 128,158,824.36, 176,860,026.76 and 69,421,489.44 is: 95,802,115.39
Step by Step Solution
- Step 1: Write the proportion equation
128,158,824.36 : 176,860,026.76 = 69,421,489.44 : x - Step 2: Convert to fraction form
128,158,824.36/176,860,026.76 = 69,421,489.44/x - Step 3: Cross multiply
128,158,824.36x = 176,860,026.76 × 69,421,489.44 - Step 4: Simplify right side
128,158,824.36x = 12,277,886,480,077,456 - Step 5: Solve for x
x = 12,277,886,480,077,456/128,158,824.36 - Step 6: Final answer
x = 95,802,115.39
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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.