Finding the Fourth Proportional to 128,868,630.88, 177,876,184.96 and 84,221,319.76
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Solution
The fourth proportional to 128,868,630.88, 177,876,184.96 and 84,221,319.76 is: 116,249,912.40
Step by Step Solution
- Step 1: Write the proportion equation
128,868,630.88 : 177,876,184.96 = 84,221,319.76 : x - Step 2: Convert to fraction form
128,868,630.88/177,876,184.96 = 84,221,319.76/x - Step 3: Cross multiply
128,868,630.88x = 177,876,184.96 × 84,221,319.76 - Step 4: Simplify right side
128,868,630.88x = 14,980,967,051,205,064 - Step 5: Solve for x
x = 14,980,967,051,205,064/128,868,630.88 - Step 6: Final answer
x = 116,249,912.40
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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.