Finding the Fourth Proportional to 128,910,615.78, 177,896,668.97 and 70,173,726.81
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Solution
The fourth proportional to 128,910,615.78, 177,896,668.97 and 70,173,726.81 is: 96,839,753.44
Step by Step Solution
- Step 1: Write the proportion equation
128,910,615.78 : 177,896,668.97 = 70,173,726.81 : x - Step 2: Convert to fraction form
128,910,615.78/177,896,668.97 = 70,173,726.81/x - Step 3: Cross multiply
128,910,615.78x = 177,896,668.97 × 70,173,726.81 - Step 4: Simplify right side
128,910,615.78x = 12,483,672,248,218,106 - Step 5: Solve for x
x = 12,483,672,248,218,106/128,910,615.78 - Step 6: Final answer
x = 96,839,753.44
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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.