Finding the Fourth Proportional to 78,976,879.80, 118,465,319.70 and 65,539,951.80
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Solution
The fourth proportional to 78,976,879.80, 118,465,319.70 and 65,539,951.80 is: 98,309,927.70
Step by Step Solution
- Step 1: Write the proportion equation
78,976,879.80 : 118,465,319.70 = 65,539,951.80 : x - Step 2: Convert to fraction form
78,976,879.80/118,465,319.70 = 65,539,951.80/x - Step 3: Cross multiply
78,976,879.80x = 118,465,319.70 × 65,539,951.80 - Step 4: Simplify right side
78,976,879.80x = 7,764,211,343,109,590 - Step 5: Solve for x
x = 7,764,211,343,109,590/78,976,879.80 - Step 6: Final answer
x = 98,309,927.70
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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.