Finding the Fourth Proportional to 78,868,493.80, 118,302,740.70 and 65,431,565.80
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Solution
The fourth proportional to 78,868,493.80, 118,302,740.70 and 65,431,565.80 is: 98,147,348.70
Step by Step Solution
- Step 1: Write the proportion equation
78,868,493.80 : 118,302,740.70 = 65,431,565.80 : x - Step 2: Convert to fraction form
78,868,493.80/118,302,740.70 = 65,431,565.80/x - Step 3: Cross multiply
78,868,493.80x = 118,302,740.70 × 65,431,565.80 - Step 4: Simplify right side
78,868,493.80x = 7,740,733,562,432,388 - Step 5: Solve for x
x = 7,740,733,562,432,388/78,868,493.80 - Step 6: Final answer
x = 98,147,348.70
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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.