Finding the Fourth Proportional to 85,968,657.80, 128,952,986.70 and 74,771,217.80
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Solution
The fourth proportional to 85,968,657.80, 128,952,986.70 and 74,771,217.80 is: 112,156,826.70
Step by Step Solution
- Step 1: Write the proportion equation
85,968,657.80 : 128,952,986.70 = 74,771,217.80 : x - Step 2: Convert to fraction form
85,968,657.80/128,952,986.70 = 74,771,217.80/x - Step 3: Cross multiply
85,968,657.80x = 128,952,986.70 × 74,771,217.80 - Step 4: Simplify right side
85,968,657.80x = 9,641,971,854,506,204 - Step 5: Solve for x
x = 9,641,971,854,506,204/85,968,657.80 - Step 6: Final answer
x = 112,156,826.70
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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.