Finding the Fourth Proportional to 287,762.85, 431,643.60 and 77,400.99
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Solution
The fourth proportional to 287,762.85, 431,643.60 and 77,400.99 is: 116,101.30
Step by Step Solution
- Step 1: Write the proportion equation
287,762.85 : 431,643.60 = 77,400.99 : x - Step 2: Convert to fraction form
287,762.85/431,643.60 = 77,400.99/x - Step 3: Cross multiply
287,762.85x = 431,643.60 × 77,400.99 - Step 4: Simplify right side
287,762.85x = 33,409,641,967.16 - Step 5: Solve for x
x = 33,409,641,967.16/287,762.85 - Step 6: Final answer
x = 116,101.30
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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.