Finding the Fourth Proportional to 85,806,538.80, 128,709,808.20 and 76,400,689.20
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Solution
The fourth proportional to 85,806,538.80, 128,709,808.20 and 76,400,689.20 is: 114,601,033.80
Step by Step Solution
- Step 1: Write the proportion equation
85,806,538.80 : 128,709,808.20 = 76,400,689.20 : x - Step 2: Convert to fraction form
85,806,538.80/128,709,808.20 = 76,400,689.20/x - Step 3: Cross multiply
85,806,538.80x = 128,709,808.20 × 76,400,689.20 - Step 4: Simplify right side
85,806,538.80x = 9,833,518,053,279,812 - Step 5: Solve for x
x = 9,833,518,053,279,812/85,806,538.80 - Step 6: Final answer
x = 114,601,033.80
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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.