Finding the Fourth Proportional to 81,152,660.16, 111,925,370.70 and 71,342,128.08
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Solution
The fourth proportional to 81,152,660.16, 111,925,370.70 and 71,342,128.08 is: 98,394,730.57
Step by Step Solution
- Step 1: Write the proportion equation
81,152,660.16 : 111,925,370.70 = 71,342,128.08 : x - Step 2: Convert to fraction form
81,152,660.16/111,925,370.70 = 71,342,128.08/x - Step 3: Cross multiply
81,152,660.16x = 111,925,370.70 × 71,342,128.08 - Step 4: Simplify right side
81,152,660.16x = 7,984,994,131,880,879 - Step 5: Solve for x
x = 7,984,994,131,880,879/81,152,660.16 - Step 6: Final answer
x = 98,394,730.57
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.