Finding the Fourth Proportional to 86,220,267.20, 129,330,400.80 and 78,257,643.20
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Solution
The fourth proportional to 86,220,267.20, 129,330,400.80 and 78,257,643.20 is: 117,386,464.80
Step by Step Solution
- Step 1: Write the proportion equation
86,220,267.20 : 129,330,400.80 = 78,257,643.20 : x - Step 2: Convert to fraction form
86,220,267.20/129,330,400.80 = 78,257,643.20/x - Step 3: Cross multiply
86,220,267.20x = 129,330,400.80 × 78,257,643.20 - Step 4: Simplify right side
86,220,267.20x = 10,121,092,360,719,394 - Step 5: Solve for x
x = 10,121,092,360,719,394/86,220,267.20 - Step 6: Final answer
x = 117,386,464.80
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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.