Finding the Fourth Proportional to 81,557,899.20, 122,336,848.80 and 66,627,979.20
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Solution
The fourth proportional to 81,557,899.20, 122,336,848.80 and 66,627,979.20 is: 99,941,968.80
Step by Step Solution
- Step 1: Write the proportion equation
81,557,899.20 : 122,336,848.80 = 66,627,979.20 : x - Step 2: Convert to fraction form
81,557,899.20/122,336,848.80 = 66,627,979.20/x - Step 3: Cross multiply
81,557,899.20x = 122,336,848.80 × 66,627,979.20 - Step 4: Simplify right side
81,557,899.20x = 8,151,057,017,239,945 - Step 5: Solve for x
x = 8,151,057,017,239,945/81,557,899.20 - Step 6: Final answer
x = 99,941,968.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.