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Finding the Fourth Proportional to 124,649.69, 186,761.84 and 68,536.80

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Solution

The fourth proportional to 124,649.69, 186,761.84 and 68,536.80 is: 102,688.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,649.69 : 186,761.84 = 68,536.80 : x
  2. Step 2: Convert to fraction form
    124,649.69/186,761.84 = 68,536.80/x
  3. Step 3: Cross multiply
    124,649.69x = 186,761.84 × 68,536.80
  4. Step 4: Simplify right side
    124,649.69x = 12,800,058,533.03
  5. Step 5: Solve for x
    x = 12,800,058,533.03/124,649.69
  6. Step 6: Final answer
    x = 102,688.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.