Finding the Fourth Proportional to 81,551,204.80, 122,326,807.20 and 78,415,921.60
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Solution
The fourth proportional to 81,551,204.80, 122,326,807.20 and 78,415,921.60 is: 117,623,882.40
Step by Step Solution
- Step 1: Write the proportion equation
81,551,204.80 : 122,326,807.20 = 78,415,921.60 : x - Step 2: Convert to fraction form
81,551,204.80/122,326,807.20 = 78,415,921.60/x - Step 3: Cross multiply
81,551,204.80x = 122,326,807.20 × 78,415,921.60 - Step 4: Simplify right side
81,551,204.80x = 9,592,369,322,973,516 - Step 5: Solve for x
x = 9,592,369,322,973,516/81,551,204.80 - Step 6: Final answer
x = 117,623,882.40
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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.