Finding the Fourth Proportional to 81,649,903.10, 122,474,854.65 and 78,878,536.70
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Solution
The fourth proportional to 81,649,903.10, 122,474,854.65 and 78,878,536.70 is: 118,317,805.05
Step by Step Solution
- Step 1: Write the proportion equation
81,649,903.10 : 122,474,854.65 = 78,878,536.70 : x - Step 2: Convert to fraction form
81,649,903.10/122,474,854.65 = 78,878,536.70/x - Step 3: Cross multiply
81,649,903.10x = 122,474,854.65 × 78,878,536.70 - Step 4: Simplify right side
81,649,903.10x = 9,660,637,317,337,192 - Step 5: Solve for x
x = 9,660,637,317,337,192/81,649,903.10 - Step 6: Final answer
x = 118,317,805.05
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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.