Finding the Fourth Proportional to 81,909,511.80, 122,864,267.70 and 21,325,237.80
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Solution
The fourth proportional to 81,909,511.80, 122,864,267.70 and 21,325,237.80 is: 31,987,856.70
Step by Step Solution
- Step 1: Write the proportion equation
81,909,511.80 : 122,864,267.70 = 21,325,237.80 : x - Step 2: Convert to fraction form
81,909,511.80/122,864,267.70 = 21,325,237.80/x - Step 3: Cross multiply
81,909,511.80x = 122,864,267.70 × 21,325,237.80 - Step 4: Simplify right side
81,909,511.80x = 2,620,109,725,825,359 - Step 5: Solve for x
x = 2,620,109,725,825,359/81,909,511.80 - Step 6: Final answer
x = 31,987,856.70
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1.5x scale
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.