Finding the Fourth Proportional to 81,262,564.80, 121,893,847.20 and 38,215,843.80
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Solution
The fourth proportional to 81,262,564.80, 121,893,847.20 and 38,215,843.80 is: 57,323,765.70
Step by Step Solution
- Step 1: Write the proportion equation
81,262,564.80 : 121,893,847.20 = 38,215,843.80 : x - Step 2: Convert to fraction form
81,262,564.80/121,893,847.20 = 38,215,843.80/x - Step 3: Cross multiply
81,262,564.80x = 121,893,847.20 × 38,215,843.80 - Step 4: Simplify right side
81,262,564.80x = 4,658,276,224,776,267 - Step 5: Solve for x
x = 4,658,276,224,776,267/81,262,564.80 - Step 6: Final answer
x = 57,323,765.70
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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.