Finding the Fourth Proportional to 128,203,782.24, 176,924,513.28 and 78,671,522.44
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Solution
The fourth proportional to 128,203,782.24, 176,924,513.28 and 78,671,522.44 is: 108,568,722.18
Step by Step Solution
- Step 1: Write the proportion equation
128,203,782.24 : 176,924,513.28 = 78,671,522.44 : x - Step 2: Convert to fraction form
128,203,782.24/176,924,513.28 = 78,671,522.44/x - Step 3: Cross multiply
128,203,782.24x = 176,924,513.28 × 78,671,522.44 - Step 4: Simplify right side
128,203,782.24x = 13,918,920,816,693,598 - Step 5: Solve for x
x = 13,918,920,816,693,598/128,203,782.24 - Step 6: Final answer
x = 108,568,722.18
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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.