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Finding the Fourth Proportional to 127,666.63, 176,185.41 and 71,078

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Solution

The fourth proportional to 127,666.63, 176,185.41 and 71,078 is: 98,090.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,666.63 : 176,185.41 = 71,078 : x
  2. Step 2: Convert to fraction form
    127,666.63/176,185.41 = 71,078/x
  3. Step 3: Cross multiply
    127,666.63x = 176,185.41 × 71,078
  4. Step 4: Simplify right side
    127,666.63x = 12,522,906,571.98
  5. Step 5: Solve for x
    x = 12,522,906,571.98/127,666.63
  6. Step 6: Final answer
    x = 98,090.68

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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.