Finding the Fourth Proportional to 76,734,019.60, 115,101,029.40 and 66,880,272.40
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Solution
The fourth proportional to 76,734,019.60, 115,101,029.40 and 66,880,272.40 is: 100,320,408.60
Step by Step Solution
- Step 1: Write the proportion equation
76,734,019.60 : 115,101,029.40 = 66,880,272.40 : x - Step 2: Convert to fraction form
76,734,019.60/115,101,029.40 = 66,880,272.40/x - Step 3: Cross multiply
76,734,019.60x = 115,101,029.40 × 66,880,272.40 - Step 4: Simplify right side
76,734,019.60x = 7,697,988,199,792,409 - Step 5: Solve for x
x = 7,697,988,199,792,409/76,734,019.60 - Step 6: Final answer
x = 100,320,408.60
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1.5x scale
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.