Finding the Fourth Proportional to 128,432,003,262.48, 177,196,178,988.84 and 74,218,801,434.48
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Solution
The fourth proportional to 128,432,003,262.48, 177,196,178,988.84 and 74,218,801,434.48 is: 102,398,838,990.65
Step by Step Solution
- Step 1: Write the proportion equation
128,432,003,262.48 : 177,196,178,988.84 = 74,218,801,434.48 : x - Step 2: Convert to fraction form
128,432,003,262.48/177,196,178,988.84 = 74,218,801,434.48/x - Step 3: Cross multiply
128,432,003,262.48x = 177,196,178,988.84 × 74,218,801,434.48 - Step 4: Simplify right side
128,432,003,262.48x = 13,151,288,023,321,292,046,336 - Step 5: Solve for x
x = 13,151,288,023,321,292,046,336/128,432,003,262.48 - Step 6: Final answer
x = 102,398,838,990.65
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1.5x scale
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.