Finding the Fourth Proportional to 85,824,282.40, 128,736,423.60 and 76,418,432.80
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Solution
The fourth proportional to 85,824,282.40, 128,736,423.60 and 76,418,432.80 is: 114,627,649.20
Step by Step Solution
- Step 1: Write the proportion equation
85,824,282.40 : 128,736,423.60 = 76,418,432.80 : x - Step 2: Convert to fraction form
85,824,282.40/128,736,423.60 = 76,418,432.80/x - Step 3: Cross multiply
85,824,282.40x = 128,736,423.60 × 76,418,432.80 - Step 4: Simplify right side
85,824,282.40x = 9,837,835,735,788,934 - Step 5: Solve for x
x = 9,837,835,735,788,934/85,824,282.40 - Step 6: Final answer
x = 114,627,649.20
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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.