Finding the Fourth Proportional to 128,461,755.72, 177,276,775.82 and 69,724,420.66
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Solution
The fourth proportional to 128,461,755.72, 177,276,775.82 and 69,724,420.66 is: 96,219,457.86
Step by Step Solution
- Step 1: Write the proportion equation
128,461,755.72 : 177,276,775.82 = 69,724,420.66 : x - Step 2: Convert to fraction form
128,461,755.72/177,276,775.82 = 69,724,420.66/x - Step 3: Cross multiply
128,461,755.72x = 177,276,775.82 × 69,724,420.66 - Step 4: Simplify right side
128,461,755.72x = 12,360,520,490,522,196 - Step 5: Solve for x
x = 12,360,520,490,522,196/128,461,755.72 - Step 6: Final answer
x = 96,219,457.86
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.