Finding the Fourth Proportional to 128,430,550.78, 177,234,160.09 and 69,693,215.90
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Solution
The fourth proportional to 128,430,550.78, 177,234,160.09 and 69,693,215.90 is: 96,176,637.95
Step by Step Solution
- Step 1: Write the proportion equation
128,430,550.78 : 177,234,160.09 = 69,693,215.90 : x - Step 2: Convert to fraction form
128,430,550.78/177,234,160.09 = 69,693,215.90/x - Step 3: Cross multiply
128,430,550.78x = 177,234,160.09 × 69,693,215.90 - Step 4: Simplify right side
128,430,550.78x = 12,352,018,583,215,982 - Step 5: Solve for x
x = 12,352,018,583,215,982/128,430,550.78 - Step 6: Final answer
x = 96,176,637.95
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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.