Finding the Fourth Proportional to 85,915,402.20, 128,943,605.70 and 85,243,555.80
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Solution
The fourth proportional to 85,915,402.20, 128,943,605.70 and 85,243,555.80 is: 127,935,284.78
Step by Step Solution
- Step 1: Write the proportion equation
85,915,402.20 : 128,943,605.70 = 85,243,555.80 : x - Step 2: Convert to fraction form
85,915,402.20/128,943,605.70 = 85,243,555.80/x - Step 3: Cross multiply
85,915,402.20x = 128,943,605.70 × 85,243,555.80 - Step 4: Simplify right side
85,915,402.20x = 10,991,611,447,541,148 - Step 5: Solve for x
x = 10,991,611,447,541,148/85,915,402.20 - Step 6: Final answer
x = 127,935,284.78
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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.