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Finding the Fourth Proportional to 111,920.85, 167,775.73 and 55,707.81

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Solution

The fourth proportional to 111,920.85, 167,775.73 and 55,707.81 is: 83,509.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,920.85 : 167,775.73 = 55,707.81 : x
  2. Step 2: Convert to fraction form
    111,920.85/167,775.73 = 55,707.81/x
  3. Step 3: Cross multiply
    111,920.85x = 167,775.73 × 55,707.81
  4. Step 4: Simplify right side
    111,920.85x = 9,346,418,489.45
  5. Step 5: Solve for x
    x = 9,346,418,489.45/111,920.85
  6. Step 6: Final answer
    x = 83,509.18

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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.