Finding the Fourth Proportional to 128,777,033.18, 177,758,531.05 and 76,565,944.29
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Solution
The fourth proportional to 128,777,033.18, 177,758,531.05 and 76,565,944.29 is: 105,688,486.90
Step by Step Solution
- Step 1: Write the proportion equation
128,777,033.18 : 177,758,531.05 = 76,565,944.29 : x - Step 2: Convert to fraction form
128,777,033.18/177,758,531.05 = 76,565,944.29/x - Step 3: Cross multiply
128,777,033.18x = 177,758,531.05 × 76,565,944.29 - Step 4: Simplify right side
128,777,033.18x = 13,610,249,785,255,122 - Step 5: Solve for x
x = 13,610,249,785,255,122/128,777,033.18 - Step 6: Final answer
x = 105,688,486.90
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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.