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Finding the Fourth Proportional to 111,867.80, 167,364.30 and 72,501.80

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Solution

The fourth proportional to 111,867.80, 167,364.30 and 72,501.80 is: 108,469.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,867.80 : 167,364.30 = 72,501.80 : x
  2. Step 2: Convert to fraction form
    111,867.80/167,364.30 = 72,501.80/x
  3. Step 3: Cross multiply
    111,867.80x = 167,364.30 × 72,501.80
  4. Step 4: Simplify right side
    111,867.80x = 12,134,213,005.74
  5. Step 5: Solve for x
    x = 12,134,213,005.74/111,867.80
  6. Step 6: Final answer
    x = 108,469.22

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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.