Finding the Fourth Proportional to 128,602,308.10, 177,486,399.58 and 76,391,550.04
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Solution
The fourth proportional to 128,602,308.10, 177,486,399.58 and 76,391,550.04 is: 105,429,376.62
Step by Step Solution
- Step 1: Write the proportion equation
128,602,308.10 : 177,486,399.58 = 76,391,550.04 : x - Step 2: Convert to fraction form
128,602,308.10/177,486,399.58 = 76,391,550.04/x - Step 3: Cross multiply
128,602,308.10x = 177,486,399.58 × 76,391,550.04 - Step 4: Simplify right side
128,602,308.10x = 13,558,461,174,935,008 - Step 5: Solve for x
x = 13,558,461,174,935,008/128,602,308.10 - Step 6: Final answer
x = 105,429,376.62
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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.