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Finding the Fourth Proportional to 118,004.76, 162,859.68 and 72,673.80

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Solution

The fourth proportional to 118,004.76, 162,859.68 and 72,673.80 is: 100,297.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,004.76 : 162,859.68 = 72,673.80 : x
  2. Step 2: Convert to fraction form
    118,004.76/162,859.68 = 72,673.80/x
  3. Step 3: Cross multiply
    118,004.76x = 162,859.68 × 72,673.80
  4. Step 4: Simplify right side
    118,004.76x = 11,835,631,812.38
  5. Step 5: Solve for x
    x = 11,835,631,812.38/118,004.76
  6. Step 6: Final answer
    x = 100,297.92

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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.