Finding the Fourth Proportional to 128,513,152.88, 177,494,169.96 and 86,624,973.20
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Solution
The fourth proportional to 128,513,152.88, 177,494,169.96 and 86,624,973.20 is: 119,640,887.89
Step by Step Solution
- Step 1: Write the proportion equation
128,513,152.88 : 177,494,169.96 = 86,624,973.20 : x - Step 2: Convert to fraction form
128,513,152.88/177,494,169.96 = 86,624,973.20/x - Step 3: Cross multiply
128,513,152.88x = 177,494,169.96 × 86,624,973.20 - Step 4: Simplify right side
128,513,152.88x = 15,375,427,715,941,246 - Step 5: Solve for x
x = 15,375,427,715,941,246/128,513,152.88 - Step 6: Final answer
x = 119,640,887.89
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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.