Finding the Fourth Proportional to 86,032,972.80, 129,049,459.20 and 78,866,611.20
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Solution
The fourth proportional to 86,032,972.80, 129,049,459.20 and 78,866,611.20 is: 118,299,916.80
Step by Step Solution
- Step 1: Write the proportion equation
86,032,972.80 : 129,049,459.20 = 78,866,611.20 : x - Step 2: Convert to fraction form
86,032,972.80/129,049,459.20 = 78,866,611.20/x - Step 3: Cross multiply
86,032,972.80x = 129,049,459.20 × 78,866,611.20 - Step 4: Simplify right side
86,032,972.80x = 10,177,693,524,296,664 - Step 5: Solve for x
x = 10,177,693,524,296,664/86,032,972.80 - Step 6: Final answer
x = 118,299,916.80
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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.