Finding the Fourth Proportional to 78,477.90, 117,544.05 and 69,722.70
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Solution
The fourth proportional to 78,477.90, 117,544.05 and 69,722.70 is: 104,430.53
Step by Step Solution
- Step 1: Write the proportion equation
78,477.90 : 117,544.05 = 69,722.70 : x - Step 2: Convert to fraction form
78,477.90/117,544.05 = 69,722.70/x - Step 3: Cross multiply
78,477.90x = 117,544.05 × 69,722.70 - Step 4: Simplify right side
78,477.90x = 8,195,488,534.94 - Step 5: Solve for x
x = 8,195,488,534.94/78,477.90 - Step 6: Final answer
x = 104,430.53
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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.