Finding the Fourth Proportional to 77,328,772.80, 115,990,534.80 and 19,821,607.80
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Solution
The fourth proportional to 77,328,772.80, 115,990,534.80 and 19,821,607.80 is: 29,731,738.99
Step by Step Solution
- Step 1: Write the proportion equation
77,328,772.80 : 115,990,534.80 = 19,821,607.80 : x - Step 2: Convert to fraction form
77,328,772.80/115,990,534.80 = 19,821,607.80/x - Step 3: Cross multiply
77,328,772.80x = 115,990,534.80 × 19,821,607.80 - Step 4: Simplify right side
77,328,772.80x = 2,299,118,889,317,851.50 - Step 5: Solve for x
x = 2,299,118,889,317,851.50/77,328,772.80 - Step 6: Final answer
x = 29,731,738.99
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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.